# Harpd Agent Data (remote · api.harpd.com)

Live rankings and pricing for 10,000+ AI products and LLMs. Free tier; paid data via x402.

- Trust score: 64/100 (medium)
- Change this week: −3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-29

## Components

- remote · `api.harpd.com`: 64/100 (this document), [markdown](https://verifymcp.io/servers/com-harpd-agent-data/api.md), [page](https://verifymcp.io/servers/com-harpd-agent-data/api)

## Channel facts

- Endpoint: `https://api.harpd.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.1`

## 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 2026-09-29.

- **Endpoint Security**: 66/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS check failed: the endpoint is reachable over plaintext HTTP.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 66/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 869 tokens (~124/item across 7 items; 7 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 check failed: schema churn in the 11 days we've observed: 3 tool removals, 0 breaking changes, 0 auth/transport breaks, 3 additions.
- **Tool Coverage**: 74/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 11% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 8 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the Harpd Agent Data MCP server?

Harpd Agent Data is a hosted endpoint at https://api.harpd.com/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-harpd-agent-data 'https://api.harpd.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-harpd-agent-data": {
      "url": "https://api.harpd.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-harpd-agent-data": {
      "type": "http",
      "url": "https://api.harpd.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-harpd-agent-data]
url = "https://api.harpd.com/mcp"
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add com-harpd-agent-data --url 'https://api.harpd.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-harpd-agent-data:
    url: "https://api.harpd.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-harpd-agent-data": {
      "Transport": "http",
      "Url": "https://api.harpd.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-harpd-agent-data -t streamable-http -u 'https://api.harpd.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-harpd-agent-data": {
      "type": "http",
      "url": "https://api.harpd.com/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.

### 2026-09-28 (score 64, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-25 (score 64, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-23 (score 64, −3)

- [security regression] Stability: 0.13 → fail
- [security regression] A breaking change shipped without a version bump: still 1.0.0
- [security regression] Tool “compare_products” was removed
- [security regression] Tool “optimize_model” was removed
- [security regression] Tool “research_products” was removed
- [security] The server rewrote its instructions, which are the text every model session reads
- [functional] New tool “harpd_compare”
- [functional] New tool “harpd_optimize”
- [functional] New tool “harpd_research”

### 2026-09-22 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-20 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-19 (score 65, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-09-18 (score 65)

First indexed and scored.

## MCP tools (7)

### `get_historical_data` (~163 tokens)

Harpd historical rank intelligence

The rank history of one AI product over 3, 6 or 12 months: position over time, rank movement, best and worst position, and the archived period results. This is the one thing a single page view of the board cannot tell an agent — whether a position is rising or falling. PAID: 0.05 USDC per call, settled over x402 on Base. This tool returns HTTP 402 with x402 payment requirements when no payment is attached; sign the payment and retry. Canonical: https://harpd.com/rank/

Input parameters:

- `category` (string)
- `period` (string)
- `product` (string, required): Harpd product slug, e.g. "claude".
- `scope` (string)

### `get_rank` (~70 tokens)

Harpd AI product rankings

Free Harpd Rank board for any scope and category, in the unified agent envelope. FREE: no payment, no API key, no account required. Canonical: https://harpd.com/rank/

Input parameters:

- `category` (string)
- `limit` (integer)
- `scope` (string)

Output parameters:

- `data` (object)
- `meta` (object)

### `harpd_compare` (~103 tokens)

Harpd AI product comparison

Head-to-head comparison of 2–8 AI products: category, published rank, list pricing where the product is a priced model, and the material differences between them. PAID: 0.01 USDC per call, settled over x402 on Base. This tool returns HTTP 402 with x402 payment requirements when no payment is attached; sign the payment and retry. Canonical: https://harpd.com/compare/

Input parameters:

- `products` (array, required)

### `harpd_optimize` (~149 tokens)

Harpd AI model cost optimization

Given a task and the model currently running it, returns cheaper candidate models that still clear the task quality floor, with per-call and projected monthly savings, the performance trade-off, a confidence value and the evidence behind every number. PAID: 0.01 USDC per call, settled over x402 on Base. This tool returns HTTP 402 with x402 payment requirements when no payment is attached; sign the payment and retry. Canonical: https://harpd.com/developers/agents/

Input parameters:

- `constraints` (object)
- `current_model` (string, required)
- `max_cost` (number)
- `monthly_calls` (integer)
- `task` (string, required)

### `harpd_research` (~105 tokens)

Harpd AI product research

A structured research answer over the Harpd catalog: matching products, category distribution, price bands, evidence per claim and the sources behind them. PAID: 0.05 USDC per call, settled over x402 on Base. This tool returns HTTP 402 with x402 payment requirements when no payment is attached; sign the payment and retry. Canonical: https://harpd.com/research/

Input parameters:

- `limit` (integer)
- `query` (string, required)

### `search_products` (~73 tokens)

Harpd AI product search

Free keyword search over the published Harpd AI product catalog, with category filters and stable machine-readable results. FREE: no payment, no API key, no account required. Canonical: https://harpd.com/products/

Input parameters:

- `category` (string)
- `limit` (integer)
- `q` (string, required)

Output parameters:

- `data` (object)
- `meta` (object)

### `verify_agent_payment` (~137 tokens)

Harpd testnet payment smoke test

A deliberately trivial paid product that exists so an agent can prove its whole x402 payment path — 402 challenge, signing, settlement, receipt — before it spends anything on data. Costs $0.01 and returns the request it received plus the settlement receipt. PAID: 0.01 USDC per call, settled over x402 on Base. This tool returns HTTP 402 with x402 payment requirements when no payment is attached; sign the payment and retry. Canonical: https://harpd.com/developers/agents/

Input parameters:

- `echo` (string): Any string; returned unchanged so the caller can correlate the round trip.

## Diagnostics

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

## Score history

- 2026-09-29: 64
- 2026-09-28: 64
- 2026-09-27: 64
- 2026-09-26: 64
- 2026-09-25: 64
- 2026-09-24: 64
- 2026-09-23: 64
- 2026-09-22: 67
- 2026-09-21: 66
- 2026-09-20: 66
- 2026-09-19: 65
- 2026-09-18: 65

## Common questions

### What is the Harpd Agent Data MCP server?

Harpd Agent Data is an MCP server listed in the public MCP registry as com.harpd/agent-data. Live rankings and pricing for 10,000+ AI products and LLMs. Free tier; paid data via x402. This page covers its hosted endpoint (https://api.harpd.com/mcp).

### Is the Harpd Agent Data MCP server safe to use?

Harpd Agent Data scores 64 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 Harpd Agent Data MCP server expose?

Harpd Agent Data exposes 7 tools: get_historical_data, get_rank, harpd_compare, harpd_optimize, harpd_research, and 2 more. Their descriptions and schemas cost roughly 800 tokens of context every time the server is loaded.

### Does the Harpd Agent Data MCP server require authentication?

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

### Is the Harpd Agent Data MCP server still maintained?

Harpd Agent Data is still listed as active in the MCP registry. We last reached this channel on 29 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://api.harpd.com/mcp
- Changelog RSS feed: https://verifymcp.io/servers/com-harpd-agent-data/api.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-harpd-agent-data/api.json
- HTML version of this page: https://verifymcp.io/servers/com-harpd-agent-data/api