Polygon Io
NPM · @PIPEWORX/MCP-POLYGON-IO · 2 COMPONENTS
Massive (formerly Polygon.io) MCP.
Available components
Last scanned (9 hours ago)
Scores higher than 65% of npm servers
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- No production dependencies, so there is no dependency health to assess. View diagnostics → Pass
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to pipeworx-io/mcp-polygon-io). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 0 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability66
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 895 tokens (~74/item across 12 items; 12 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management23
- Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage67
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 0% of tool parameters carry a description.Fail
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 12 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 13 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 5 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 4 Nov 26 +2
- Tool safety: pass → unverified ▼ security
- Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- Stability: unverified → 0.20 ▲ functional
- First check of Schema quality: unverified functional
- Package version: 0.2.0 → 0.2.1 functional
- 30 Oct 26 0
- Security disclosure: unverified → fail ▼ functional
- 29 Oct 26 77
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Analysed npm/@pipeworx/mcp-polygon-io@0.2.1
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | pipeworx-io/mcp-polygon-io |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/pipeworx-io/mcp-polygon-io/.github/workflows/publish.yml@refs/heads/main |
| Rekor log index | 3691852671 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:f97c1701427f0506fd9cb2dd3a9eec8ca9f34d52c7b7a461d1eff2fcd4f5429d936d61797904706fb17d306f9b47d0704ab8e149772beb69e047730b9 |
Background: How many MCP packages publish verified provenance →
Dependencies 0 packages
| Packages resolved | 0 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
aggregates ~118
Massive (formerly Polygon.io) OHLC price bars for a US stock ticker — 1 minute through quarterly granularity. Returns timestamped open/high/low/close + volume + VWAP. Use for charting equities, intraday analysis, backtesting historical prices.
| Name | Type | Req | Description |
|---|---|---|---|
| adjusted | boolean | – | – |
| from | string | yes | – |
| limit | number | – | – |
| multiplier | number | yes | – |
| sort | string | – | – |
| ticker | string | yes | – |
| timespan | string | yes | – |
| to | string | yes | – |
No output schema declared.
No examples provided.
daily_open_close ~69
Fetch official open, high, low, close, volume, and after-hours/pre-market prices for a US stock ticker on a specific date (YYYY-MM-DD) from Massive (formerly Polygon.io).
| Name | Type | Req | Description |
|---|---|---|---|
| adjusted | boolean | – | – |
| date | string | yes | – |
| ticker | string | yes | – |
No output schema declared.
No examples provided.
dividends ~81
Historical and upcoming cash + stock dividends for a US-listed ticker, from Massive (formerly Polygon.io): ex-date, record date, pay date, declaration date, cash amount, dividend type, frequency. Use for income analysis and dividend-capture strategies.
| Name | Type | Req | Description |
|---|---|---|---|
| ex_dividend_date | string | – | – |
| limit | number | – | – |
| ticker | string | – | – |
No output schema declared.
No examples provided.
exchanges ~68
Reference list of exchanges Massive (formerly Polygon.io) covers: US stock exchanges (NYSE, NASDAQ, etc.), options venues, crypto exchanges, and OTC tiers. Returns MIC code, name, asset class, type, locale.
| Name | Type | Req | Description |
|---|---|---|---|
| asset_class | string | – | – |
| locale | string | – | – |
No output schema declared.
No examples provided.
grouped_daily ~60
Fetch OHLCV bars for all US stocks on a given date (YYYY-MM-DD) from Massive (formerly Polygon.io) in a single call; useful for market-wide snapshot or screening.
| Name | Type | Req | Description |
|---|---|---|---|
| adjusted | boolean | – | – |
| date | string | yes | – |
No output schema declared.
No examples provided.
market_holidays ~42
Return the list of upcoming US stock market holidays from Massive (formerly Polygon.io), including date, holiday name, and exchange status (open/closed/early-close).
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
market_status ~12
Current market status.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
news ~106
Massive (formerly Polygon.io) financial news: ticker-tagged US stock market headlines with publisher, article URL, image, summary, and per-ticker sentiment insights. Use for "what is the news on $TICKER" or "market-moving headlines today". Prefer over web search for equity-focused news.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | number | – | – |
| order | string | – | – |
| published_utc | string | – | – |
| sort | string | – | – |
| ticker | string | – | – |
No output schema declared.
No examples provided.
previous_close ~50
Fetch the previous trading session's open, high, low, close, and volume for a US stock ticker from Massive (formerly Polygon.io).
| Name | Type | Req | Description |
|---|---|---|---|
| adjusted | boolean | – | – |
| ticker | string | yes | – |
No output schema declared.
No examples provided.
splits ~63
Historical stock splits for a US-listed ticker, from Massive (formerly Polygon.io): split ratio, execution date, ticker. Use to adjust historical price comparisons across split events.
| Name | Type | Req | Description |
|---|---|---|---|
| execution_date | string | – | – |
| limit | number | – | – |
| ticker | string | – | – |
No output schema declared.
No examples provided.
ticker_details ~56
Fetch full Massive (formerly Polygon.io) reference details for a single ticker: company name, description, SIC code, primary exchange, locale, market cap, phone, address, homepage URL, and logo.
| Name | Type | Req | Description |
|---|---|---|---|
| ticker | string | yes | – |
No output schema declared.
No examples provided.
tickers ~115
Search Massive (formerly Polygon.io) reference universe for US stocks, options, indices, forex, and crypto tickers. Returns symbol, name, market, asset class, primary exchange, currency. Use to resolve a company name to a tradable symbol.
| Name | Type | Req | Description |
|---|---|---|---|
| active | boolean | – | – |
| exchange | string | – | – |
| limit | number | – | – |
| market | string | – | – |
| order | string | – | – |
| search | string | – | – |
| sort | string | – | – |
| type | string | – | – |
No output schema declared.
No examples provided.
How do I install the Polygon Io MCP server?
Polygon Io runs locally as an npm package, launched with npx -y @pipeworx/mcp-polygon-io. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @pipeworx/mcp-polygon-io
claude mcp add pipeworx-io-polygon-io -- npx -y @pipeworx/mcp-polygon-io
What is the Polygon Io MCP server?
Polygon Io is an MCP server listed in the public MCP registry as io.github.pipeworx-io/polygon-io. Massive (formerly Polygon.io) MCP. This page covers its npm package (@pipeworx/mcp-polygon-io).
Is the Polygon Io MCP server safe to use?
Polygon Io scores 80 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. 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 Polygon Io MCP server expose?
Polygon Io exposes 12 tools: tickers, ticker_details, aggregates, daily_open_close, previous_close, and 7 more. Their descriptions and schemas cost roughly 840 tokens of context every time the server is loaded.
Is the Polygon Io MCP server still maintained?
Polygon Io is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the Polygon Io MCP server under?
Polygon Io declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.