# Basis (remote · www.basischarts.com)

Crypto market data, 200 indicators, order flow and a chart link. No account, no API key.

- Trust score: 63/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- remote · `www.basischarts.com`: 63/100 (this document), [markdown](https://verifymcp.io/servers/com-basischarts-basis/api-mcp.md), [page](https://verifymcp.io/servers/com-basischarts-basis/api-mcp)

## Channel facts

- Endpoint: `https://www.basischarts.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (drawing_delete).
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 67/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 7692 tokens (~197/item across 39 items; 39 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 87/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 62% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - All 3 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.
  - An AI judge read all 40 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

## Install

### How do I install the Basis MCP server?

Basis is a hosted endpoint at https://www.basischarts.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-basischarts-basis 'https://www.basischarts.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-basischarts-basis": {
      "url": "https://www.basischarts.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-basischarts-basis": {
      "type": "http",
      "url": "https://www.basischarts.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-basischarts-basis]
url = "https://www.basischarts.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-basischarts-basis": {
      "type": "remote",
      "url": "https://www.basischarts.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-basischarts-basis --url 'https://www.basischarts.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-basischarts-basis:
    url: "https://www.basischarts.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-basischarts-basis": {
      "Transport": "http",
      "Url": "https://www.basischarts.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-basischarts-basis -t streamable-http -u 'https://www.basischarts.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-basischarts-basis": {
      "type": "http",
      "url": "https://www.basischarts.com/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-20 (score 63)

First indexed and scored.

## MCP tools (39)

### `catalog_search` (~127 tokens)

Search what Basis can do: indicators, formula functions, built-in strategies, the extra series available inside strategy expressions, and the drawing tools with the number of anchors each one takes. Exact counts are in the system prompt catalogue. Use this before assuming something does or does not exist — and always before drawing, because a drawing tool id you guessed is refused. Leave the query empty to list everything of a kind.

Input parameters:

- `kind` (string, required)
- `limit` (number): Default 25, max 100.
- `query` (string): Free text; matches name, description and category.

### `catalog_describe` (~59 tokens)

Full detail for one catalogue entry: an indicator's parameters and defaults, a formula function's signature, or a strategy's parameters. Call this before passing parameters you have not seen.

Input parameters:

- `id` (string, required)
- `kind` (string, required)

### `crypto_quant_guide` (~100 tokens)

Domain knowledge for a crypto analysis: the constraints of the topic, the Basis tool chain, and — the part worth calling for — findings Basis has actually measured, each with its sample and verdict, plus the conventional readings it has NOT measured, marked as such. Call it before analysing a chart pattern, interpreting an indicator level, designing a strategy or judging a result that looks strong. It carries no live market data.

Input parameters:

- `topic` (string, required)

### `market_candles` (~139 tokens)

Load price history and return a handle to it, plus a summary. The bars themselves are deliberately not returned — pass the handle to the compute tools instead. Defaults to whatever is on the chart.

Input parameters:

- `bars` (number): Default 1000, max 50000.
- `exchange` (string)
- `market` (string): Default: the chart.
- `symbol` (string): Default: the chart.
- `timeframe` (string): e.g. 15m, 1h, 4h, 1d.
- `withDerivatives` (boolean): Also load funding, open interest and positioning for this contract.

### `market_relationships` (~188 tokens)

Professional multi-asset relationship analysis on timestamp-aligned closed-bar log returns. Returns a correlation matrix plus rolling correlation, OLS beta/alpha, R-squared, upside/downside correlation, relative performance, one-bar lead/lag diagnostics and a rolling log-price spread z-score versus a benchmark. Use this for BTC correlation, beta, pairs and relative-strength work; price-level correlation is deliberately not reported.

Input parameters:

- `bars` (number): Default 1500, max 10000 per market.
- `benchmark` (string): Default BTCUSDT.
- `exchange` (string)
- `market` (string)
- `rollingWindow` (number): Latest return observations. Default 90.
- `symbols` (array, required): 2 to 10 markets, e.g. ETHUSDT, SOLUSDT. Benchmark is added if omitted.
- `timeframe` (string): Default chart timeframe.

### `market_dominance` (~71 tokens)

Current crypto market-cap structure from a server-cached aggregate source: real BTC and ETH dominance, total market cap/volume, tracked stablecoin share and leading asset shares with source and timestamps. Use this for BTC.D/rotation context. This is a current snapshot, not a historical dominance backtest series.

### `market_derivatives` (~51 tokens)

Funding, open interest, positioning and taker flow for a loaded contract. Venues publish different subsets; anything a venue does not publish comes back as unavailable rather than zero.

Input parameters:

- `ref` (string, required)

### `hyperliquid_whale_read` (~206 tokens)

Read current public Hyperliquid positions for a frozen, research-screened whale cohort. Returns account-normalized consensus, participation, agreement, effective-wallet count, single-wallet concentration, liquidity and optional recent fills for the focus symbol. Use this for whale/smart-money positioning as one evidence family, never as a standalone signal.

Input parameters:

- `flowHours` (number): Recent-flow window. Default 24h, range 1-168h.
- `includeRecentFlow` (boolean): Also inspect recent focus-symbol fills for at most four leading contributors.
- `maxFlowWallets` (number): Wallets sampled for fills. Default/max 4.
- `minimumDayVolumeUsd` (number): 24h Hyperliquid notional-volume floor. Default $5,000,000.
- `symbol` (string): Focus symbol; defaults to the charted symbol.
- `topSymbols` (number): Market-consensus rows to return. Default 10, max 15.

### `indicator_compute` (~218 tokens)

Run any indicator in the catalogue. Returns EVERY output series it has — Donchian gives three bands, MACD gives line, signal and histogram — each reduced, plus the indicator's own conventional levels so the reading can be interpreted against its actual scale. Pass a symbol to load and compute in one call, or a handle to reuse data. The forming bar is excluded unless you ask for it.

Input parameters:

- `exchange` (string)
- `includeForming` (boolean)
- `market` (string): Default: the chart.
- `params` (object): Defaults are used for anything omitted.
- `plot` (string): One output only. Usually omit: the others give the reading meaning.
- `reduce` (string)
- `ref` (string): Reuse a handle from market_candles instead of loading.
- `studyId` (string, required): From catalog_search.
- `symbol` (string): Default: the chart.
- `timeframe` (string): e.g. 1h, 4h. Default: the chart.

### `formula_evaluate` (~162 tokens)

Evaluate a Basis formula expression over a loaded window. Functions are listed by catalog_search kind=formula; series named open, high, low, close, volume, returns and more. Multi-line with `let` bindings is supported; the last expression is the result.

Input parameters:

- `exchange` (string)
- `expression` (string, required)
- `includeForming` (boolean)
- `market` (string): Default: the chart.
- `parameters` (object)
- `reduce` (string)
- `ref` (string): Reuse a handle from market_candles instead of loading.
- `symbol` (string): Default: the chart.
- `timeframe` (string): e.g. 1h, 4h. Default: the chart.

### `backtest_run` (~216 tokens)

Backtest one built-in strategy with one set of parameters. Fills happen at the next bar's open and costs are charged per side. Returns risk-adjusted metrics alongside the raw return — judge on those, not on total return.

Input parameters:

- `direction` (string)
- `exchange` (string)
- `feeBps` (number): Per side. Default 4.
- `market` (string): Default: the chart.
- `maxBarsHeld` (number): Optional time stop in bars.
- `params` (object)
- `ref` (string): Reuse a handle from market_candles instead of loading.
- `slippageBps` (number): Default 1.
- `stopLossPercent` (number): Optional protective stop percentage.
- `strategyId` (string, required)
- `symbol` (string): Default: the chart.
- `takeProfitPercent` (number): Optional profit target percentage.
- `timeframe` (string): e.g. 1h, 4h. Default: the chart.

### `strategy_research` (~383 tokens)

Run one chronological research experiment across many built-in strategies, instruments and timeframes. Use this for broad discovery instead of many backtest_run calls — and in particular instead of testing one strategy on coin after coin, which is a search whether or not it is called one. It ranks only on a selection window, checks several subperiods, leaves an embargo, reveals held-out performance, doubles costs as a stress test, compares buy-and-hold, and corrects the selected Sharpe for every strategy/symbol/timeframe combination tried.

Input parameters:

- `bars` (number): Per symbol and timeframe. Default 3000, max 10000.
- `direction` (string)
- `embargoBars` (number): Gap before held-out data. Default 10.
- `exchange` (string)
- `feeBps` (number): Per side. Default 4.
- `folds` (number): Selection subperiods, 2..8. Default 4.
- `inSampleFraction` (number): Selection share, 0.5..0.8. Default 0.7.
- `market` (string): Default: the chart.
- `minimumTrades` (number): Reliability penalty threshold. Default 30.
- `slippageBps` (number): Per fill. Default 1.
- `strategyIds` (array): Built-in ids from catalog_search. Omit for the full library.
- `symbol` (string): Defaults to the charted symbol.
- `symbols` (array): Up to 8 instruments to search across, e.g. BTCUSDT, ETHUSDT. Every symbol is another trial and the deflated Sharpe accounts for it.
- `timeframes` (array): Up to 6, e.g. 15m, 1h, 4h, 1d. Defaults to the chart timeframe.

### `position_calculate` (~240 tokens)

Risk-first position sizing with quantity, notional, margin, effective leverage, fees, funding, breakeven, liquidation estimate, target R multiples and warnings. Use position_plan_on_chart instead when the user should see the plan on the chart.

Input parameters:

- `entry` (number, required)
- `equity` (number, required): Account equity in quote currency.
- `feeBps` (number): Fee per side in basis points. Default 4.
- `fundingPerDay` (number): Funding settlements per day. Default 3.
- `fundingRate` (number): Funding per settlement as a fraction, e.g. 0.0001.
- `holdingHours` (number): Expected holding time for the funding estimate.
- `leverage` (number): Selected venue leverage. Default 1.
- `maintenanceMarginRate` (number): Fraction used for approximate liquidation. Default 0.005.
- `riskPercent` (number, required): Equity risked if the stop fills, in percent.
- `side` (string, required)
- `stop` (number, required)
- `targets` (array, required): Take-profit prices and the percentage closed at each. Allocations should total 100.

### `trade_experience_retrieve` (~261 tokens)

Retrieve compact historical trade analogues for the current market state. Plans are deterministic synthetic templates, while fills, stop/target ordering, MAE/MFE and outcomes are settled on later historical candles with costs. Use it to compare similar wins and failures, never as proof of an edge.

Input parameters:

- `bars` (number): History per symbol. Default 1500; min 300, max 3000.
- `exchange` (string)
- `feeBps` (number): Fee per side. Default 4 basis points.
- `limit` (number): Displayed analogues. Default 12; max 20.
- `market` (string)
- `ref` (string): Optional market_candles handle for the query state.
- `setup` (string)
- `side` (string)
- `slippageBps` (number): Adverse slippage per side. Default 1 basis point.
- `stride` (number): Evaluate one signal point every N bars. Default 4.
- `symbol` (string): Query symbol; defaults to the chart.
- `symbols` (array): Optional same-venue peer corpus. Query symbol is always included.
- `timeframe` (string): Query timeframe; defaults to the chart.

### `news_recent` (~76 tokens)

Recent crypto headlines with an impact score and the assets each one touches. Impact is a keyword heuristic, not a judgement about the market.

Input parameters:

- `asset` (string): Base symbol, e.g. BTC. Omit for everything.
- `limit` (number): Default 15, max 40.
- `minImpact` (string)

### `news_detect_assets` (~47 tokens)

Which crypto assets a piece of text refers to. Word-bounded, so "button" does not match TON and "operation" does not match OP.

Input parameters:

- `text` (string, required)

### `chart_state` (~71 tokens)

The chart you are building for this person: venue, symbol, timeframe, chart type, every indicator with its instance id and parameters, and every drawing. Start here when you need an instance id, and call it again after changes to confirm what landed. Finish with chart_link to give the person something to open.

### `chart_set_instrument` (~73 tokens)

Point the chart at a market. Venue and symbol as the exchange writes them, e.g. BTCUSDT on binance. This changes the chart you are building, which the person opens through chart_link.

Input parameters:

- `exchange` (string)
- `market` (string)
- `symbol` (string, required)

### `chart_set_timeframe` (~62 tokens)

Change the chart timeframe, e.g. 15m, 1h, 4h, 1d. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `timeframe` (string, required)

### `chart_set_type` (~75 tokens)

Change how price is drawn — candles, heikin ashi, line, renko, footprint and others. A wrong id is refused, and the refusal lists every one that works. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `chartType` (string, required)

### `chart_add_indicator` (~82 tokens)

Put an indicator on the chart. studyId is an id or a common name ("ema20", "bollinger"); catalog_describe lists parameters. Omitted ones use the default. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `params` (object)
- `studyId` (string, required)

### `chart_update_indicator` (~85 tokens)

Retune an indicator already on the chart. Identify it by the instanceId from chart_state, not by its study id — the same indicator can be on the chart more than once at different settings. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `instanceId` (string, required)
- `params` (object, required)

### `chart_remove_indicator` (~54 tokens)

Take an indicator off the chart. Identify it by instanceId from chart_state. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `instanceId` (string, required)

### `chart_toggle_indicator` (~57 tokens)

Hide or show an indicator without removing it — useful for comparing a chart with and without something. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `instanceId` (string, required)

### `drawing_add` (~540 tokens)

Draw on the chart. Points are {time, price} in chart coordinates — time in seconds, matching the candle timestamps a data handle reports. A horizontal line needs one point; a trendline or box needs two. Both numbers must be copied from a tool result — a summary's max with its maxAt, a crossing with its time — never read off your own prose or carried over from a different computation. The result echoes back what was drawn: check it against the figures you are about to quote, because a line that disagrees with the paragraph beside it is worse than no line. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `arrowEnd` (boolean)
- `arrowStart` (boolean)
- `color` (string): A palette name. “up” and “down” are the reserved green and red — they assert a bullish or bearish claim, so use them for position zones and not for a measurement.
- `extendLeft` (boolean)
- `extendRight` (boolean)
- `fill` (string): Palette fill colour, or “none”.
- `fillOpacity` (number): Shape fill opacity from 0 to 1.
- `fontSize` (number): Label/text size from 8 to 28.
- `levels` (array): Custom Fibonacci ratios. Example: [0, 0.382, 0.5, 0.618, 0.786, 1, 1.272, 1.618].
- `lineStyle` (string)
- `opacity` (number): Strength of the whole drawing, 0.1 to 1. Fade a level that is context rather than the decision.
- `points` (array, required)
- `ref` (string): A handle from market_candles. Given one, the points are checked against the window it covers and a drawing that would land outside it is refused. Pass it whenever the coordinates came from a computat…
- `showLabels` (boolean)
- `showStats` (boolean)
- `symbol` (string): Defaults to the charted symbol.
- `text` (string): Text for annotation tools.
- `tool` (string, required): A tool id from catalog_search with kind "drawing" — e.g. horizontalLine, trendLine, rectangle, fibRetracement, longPosition or shortPosition. Prefer position_draw_on_chart for an entry/stop/target bo…
- `width` (number): Stroke width in pixels, 1 to 6.

### `fibonacci_draw` (~326 tokens)

Draw a Fibonacci study directly on the chart with exact candle coordinates and optional custom ratios. Supports retracement, extension, channel, time, fan, circle, spiral, arc and wedge variants. Prefer swing timestamps/prices returned by market_candles computations rather than visual guesses. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `arrowEnd` (boolean)
- `arrowStart` (boolean)
- `color` (string): A palette name. “up” and “down” are the reserved green and red — they assert a bullish or bearish claim, so use them for position zones and not for a measurement.
- `extendLeft` (boolean)
- `extendRight` (boolean)
- `fill` (string): Palette fill colour, or “none”.
- `fillOpacity` (number): Shape fill opacity from 0 to 1.
- `fontSize` (number): Label/text size from 8 to 28.
- `levels` (array)
- `lineStyle` (string)
- `opacity` (number): Strength of the whole drawing, 0.1 to 1. Fade a level that is context rather than the decision.
- `points` (array, required)
- `ref` (string)
- `showLabels` (boolean)
- `showStats` (boolean)
- `symbol` (string)
- `text` (string): Text for annotation tools.
- `tool` (string, required)
- `width` (number): Stroke width in pixels, 1 to 6.

### `drawing_freehand` (~319 tokens)

Create one or more precise freehand strokes as a single undoable composition. A stroke accepts arbitrary chart points; line accepts two endpoints; ellipse and rectangle accept two opposite corners and are generated smoothly. Use highlighter for translucent emphasis and brush for circles, paths and marks. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `arrowEnd` (boolean)
- `arrowStart` (boolean)
- `color` (string): A palette name. “up” and “down” are the reserved green and red — they assert a bullish or bearish claim, so use them for position zones and not for a measurement.
- `extendLeft` (boolean)
- `extendRight` (boolean)
- `fill` (string): Palette fill colour, or “none”.
- `fillOpacity` (number): Shape fill opacity from 0 to 1.
- `fontSize` (number): Label/text size from 8 to 28.
- `lineStyle` (string)
- `mode` (string)
- `opacity` (number): Strength of the whole drawing, 0.1 to 1. Fade a level that is context rather than the decision.
- `ref` (string)
- `showLabels` (boolean)
- `showStats` (boolean)
- `strokes` (array, required)
- `symbol` (string)
- `text` (string): Text for annotation tools.
- `width` (number): Stroke width in pixels, 1 to 6.

### `position_draw_on_chart` (~178 tokens)

The chart-only long/short position drawing tool. Draw an entry, stop and target box immediately when those price levels are known. It needs no account equity or risk percentage, performs no position sizing and places no order. Use position_plan_on_chart instead only when the user also wants quantity and risk calculations. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `barsWide` (number): Width when timestamps are omitted. Default 20 bars.
- `entry` (number, required)
- `fromTime` (number): Optional start timestamp in seconds.
- `side` (string, required)
- `stop` (number, required)
- `symbol` (string)
- `target` (number, required)
- `timeframe` (string)
- `toTime` (number): Optional end timestamp in seconds.

### `position_plan_on_chart` (~352 tokens)

Calculate a risk-first long/short position and draw the entry, stop and first target directly on the live chart. The drawing retains quantity, notional, margin, costs, liquidation estimate, targets, warnings and an optional sandbox program id so later analysis reads the same plan the user sees. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `barsWide` (number): Width when timestamps are omitted. Default 20 bars.
- `entry` (number, required)
- `equity` (number, required): Account equity in quote currency.
- `feeBps` (number): Fee per side in basis points. Default 4.
- `fromTime` (number): Optional start timestamp in seconds.
- `fundingPerDay` (number): Funding settlements per day. Default 3.
- `fundingRate` (number): Funding per settlement as a fraction, e.g. 0.0001.
- `holdingHours` (number): Expected holding time for the funding estimate.
- `leverage` (number): Selected venue leverage. Default 1.
- `maintenanceMarginRate` (number): Fraction used for approximate liquidation. Default 0.005.
- `note` (string)
- `riskPercent` (number, required): Equity risked if the stop fills, in percent.
- `side` (string, required)
- `stop` (number, required)
- `strategyProgramId` (string): Optional sandbox program linked to this plan.
- `symbol` (string)
- `targets` (array, required): Take-profit prices and the percentage closed at each. Allocations should total 100.
- `timeframe` (string)
- `toTime` (number): Optional end timestamp in seconds.

### `drawing_style` (~307 tokens)

Change how an existing drawing looks. Get the id from chart_state. Use it to keep several drawings apart — a measured level and a projected one should not be the same colour, and a reader has only the picture to tell them by. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `arrowEnd` (boolean)
- `arrowStart` (boolean)
- `color` (string): A palette name. “up” and “down” are the reserved green and red — they assert a bullish or bearish claim, so use them for position zones and not for a measurement.
- `extendLeft` (boolean)
- `extendRight` (boolean)
- `fill` (string): Palette fill colour, or “none”.
- `fillOpacity` (number): Shape fill opacity from 0 to 1.
- `fontSize` (number): Label/text size from 8 to 28.
- `id` (string, required): From chart_state.
- `lineStyle` (string)
- `opacity` (number): Strength of the whole drawing, 0.1 to 1. Fade a level that is context rather than the decision.
- `showLabels` (boolean)
- `showStats` (boolean)
- `symbol` (string): Defaults to the charted symbol.
- `text` (string): Text for annotation tools.
- `width` (number): Stroke width in pixels, 1 to 6.

### `drawing_delete` (~66 tokens)

Delete a drawing. This cannot be undone — the shape is not recoverable — so the user is asked first. Changes the chart you are building; call chart_link when you are done so the person can open it.

Input parameters:

- `id` (string, required)
- `symbol` (string)

### `screener_run` (~197 tokens)

Scan the venue's listed instruments for ones matching conditions, instead of looking at the open chart. Rules combine price fields, any indicator plot, or a formula expression, with ALL/ANY matching. This is the tool for "which coins are doing X right now". It fetches history for every instrument in the universe, so it is slow and worth asking for once with the right conditions rather than repeatedly with narrower ones.

Input parameters:

- `limit` (number): Matches to return. Default 25, max 60.
- `logic` (string): Default all.
- `lookback` (number): Bars. Default 300.
- `manualSymbols` (array): Optional symbols forced into the universe before current-volume ranking.
- `name` (string)
- `quote` (string): Default USDT.
- `rules` (array, required)
- `timeframe` (string): Defaults to the chart.
- `universeSize` (number): Default 50.

### `daytrade_opportunity_scan` (~184 tokens)

Run one symmetric long/short scan over the same top-volume universe and return rule-independent breadth, 24h liquidity semantics and ranked directional candidates. Use this first for comprehensive day-trade or scalp discovery; then deep-dive only the shortlist with derivatives/order-flow tools. A low match count is never reported as breadth.

Input parameters:

- `limitPerSide` (number): Candidates returned per direction. Default 10, max 25.
- `longRules` (array, required)
- `lookback` (number): Default 300.
- `manualSymbols` (array): Optional symbols forced into the universe before current-volume ranking.
- `name` (string)
- `quote` (string)
- `shortRules` (array, required)
- `timeframe` (string): Discovery timeframe; normally 15m or 1h.
- `universeSize` (number): Default 100.

### `screener_backtest` (~245 tokens)

Historically replay a cross-sectional screen at every bar. Matching instruments form an equal-weight long or short portfolio, entered at the next bar open and held to the following bar open, then re-screened. Use this when the question is whether repeatedly trading screener matches worked — a single-symbol backtest of coins that match today is not a substitute. Costs follow actual portfolio turnover, so an unchanged holding is not charged as a fresh round trip.

Input parameters:

- `direction` (string): Default long.
- `feeBps` (number): Per side. Default 4.
- `logic` (string): Default all.
- `lookback` (number): Bars. Default 300.
- `manualSymbols` (array): Optional symbols forced into the universe before current-volume ranking.
- `maxPositions` (number): Equal-weight slots, 1 to 50. Default 10.
- `name` (string)
- `quote` (string): Default USDT.
- `rules` (array, required)
- `slippageBps` (number): Per side. Default 1.
- `timeframe` (string): Defaults to the chart.
- `universeSize` (number): Default 50.

### `calendar_upcoming` (~195 tokens)

Scheduled events ahead: the next funding settlements for a contract, the Bitcoin halving projected from live block height, difficulty retargets, monthly options expiry, CME settlement and non-farm payrolls. Every row states where its date came from — live, a published rule, an estimate, or the user — because a halving projected from block arrival and an expiry fixed by convention are not equally certain. Use it before saying anything about what happens next; nothing else here looks forward. FOMC and CPI are absent on purpose: their dates are announced rather than derivable, so this does not have them.

Input parameters:

- `days` (number): Horizon ahead. Default 30, max 365.
- `impact` (string): Only events at or above this impact.
- `limit` (number): Default 20, max 50.
- `symbol` (string): Contract for funding settlements. Defaults to the charted symbol.

### `orderflow_read` (~253 tokens)

Aggressor-side order flow: buy and sell volume separated by who crossed the spread, delta, the footprint by price level, the point of control, and absorption or stacked imbalance. Measured from the venue aggressor tag, not inferred from bar direction — use it when the question is who is being aggressive, which candles cannot answer. For one candle pass candleTime, which reads exactly that bar; otherwise it reads the last `minutes`. Report coveredMinutes, not the minutes asked for.

Input parameters:

- `bucketSize` (number): Price bucket width. Omit unless matching a footprint on screen.
- `candleTime` (number): A bar open time, s or ms: reads that whole candle.
- `endTime` (number): Window end, default now.
- `exchange` (string)
- `includeSignals` (boolean): Absorption and stacked imbalance. Default true.
- `levels` (number): Price rows. Default 12, max 40.
- `market` (string): Default: the chart.
- `minutes` (number): Default 15, max 60.
- `symbol` (string): Default: the chart.
- `timeframe` (string): With candleTime. Defaults to the chart timeframe.

### `chart_link` (~223 tokens)

Publish the chart and get a URL the person can open in Basis. Call it at the end of any answer about a market: the chart is half the answer. Either build first with the chart tools, or pass symbol, timeframe, indicators and levels here to build and publish in one call. Give the URL as a link and say in one line what it shows. No account needed; the link lasts seven days.

Input parameters:

- `exchange` (string)
- `indicators` (array): Ids or common names ("ema50", "rsi", "bollinger"), or {studyId, params}.
- `levels` (array): Prices to mark as horizontal lines, or {price, label, color}.
- `market` (string)
- `note` (string): One line describing what this chart shows, for your own reply. Not stored and not shown on the chart.
- `symbol` (string): Optional: set the instrument in this call.
- `timeframe` (string): Optional, e.g. 15m, 4h, 1d.

### `chart_image` (~255 tokens)

See the chart you are building: returns a PNG of it -- candles, volume, every indicator and drawing -- rendered the way Basis draws it, plus the exact figures it shows. Use it to check structure, levels and what you drew before you describe them. Build first with the chart tools, or pass symbol, timeframe, indicators and levels to build and look in one call. Pixels are for shape; quote numbers from the figures or the data tools.

Input parameters:

- `bars` (number): Bars to show, 20-500. Default 150, widened to include every drawing.
- `exchange` (string)
- `indicators` (array): Ids or common names ("ema50", "rsi", "bollinger"), or {studyId, params}.
- `levels` (array): Prices to mark as horizontal lines, or {price, label, color}.
- `market` (string)
- `size` (string): small 800x480, medium 1200x720 (default), large 1600x960.
- `symbol` (string): Optional: set the instrument in this call.
- `timeframe` (string): Optional, e.g. 15m, 4h, 1d.

### `alert_link` (~434 tokens)

Prepare a price or indicator alert and get a link that sets it in Basis in one click. Use it whenever the person wants to be told when something happens -- a level breaks, RSI crosses 70, price moves 5%. For a price level pass price (and when, or it is chosen from the current price); for anything else pass conditions. Give the URL as a link and say in one line what it watches. Nothing is armed until they open it and confirm. No account needed; the link lasts seven days.

Input parameters:

- `conditions` (array): Instead of price. Each {left, operator, right}. An operand is a number, a price field ("close"), an indicator name ("rsi", "ema50"), or {"type":"indicator","studyId":"macd","plotKey":"histogram","par…
- `cooldownMinutes` (number): With frequency cooldown.
- `exchange` (string)
- `frequency` (string): Default once: fires, then switches itself off.
- `market` (string)
- `match` (string): How conditions combine. Default all.
- `message` (string): Optional note carried into the notification.
- `name` (string): What the person sees when it fires. Chosen for you if omitted.
- `price` (number): Shorthand for a price-level alert.
- `symbol` (string): e.g. BTCUSDT. Defaults to the chart you are building.
- `timeframe` (string): Bars the alert is checked on, e.g. 15m, 1h, 4h. One of 1m, 3m, 5m, 10m, 15m, 30m, 1h, 2h, 4h, 6h, 8h, 12h, 1d, 3d, 1w, 1M.
- `when` (string): With price. Omit to pick the crossing from where price is now.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-basischarts-basis/api-mcp#diagnostics

## Score history

- 2026-09-20: 63

## Common questions

### What is the Basis MCP server?

Basis is an MCP server listed in the public MCP registry as com.basischarts/basis. Crypto market data, 200 indicators, order flow and a chart link. No account, no API key. This page covers its hosted endpoint (https://www.basischarts.com/api/mcp).

### Is the Basis MCP server safe to use?

Basis scores 63 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Basis MCP server expose?

Basis exposes 39 tools: catalog_search, catalog_describe, crypto_quant_guide, market_candles, market_relationships, and 34 more. Their descriptions and schemas cost roughly 7,177 tokens of context every time the server is loaded.

### Does the Basis MCP server require authentication?

No. We connected to Basis without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Basis MCP server still maintained?

Basis is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://www.basischarts.com/api/mcp
- Website: https://www.basischarts.com/mcp
- Changelog RSS feed: https://verifymcp.io/servers/com-basischarts-basis/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-basischarts-basis/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-basischarts-basis/api-mcp