Harpd MCP server

Which servers in the official MCP registry are Harpd's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-18

← Back to Harpd

Whose server it is

Registry namecom.harpd/agent-dataverified in the MCP registry

The registry name sits under harpd.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-18

Stateanswerschecked 2026-10-18
Tools7
Server calls itselfharpd-agent-data
Server version1.0.0
Protocol version2026-07-28

On 2026-10-18 the server answered initialize and tools/list without a sign-in. First answer in 636 ms.

Measured dailydaily checks: 2, the first on 2026-10-19

Answeredmeasuring2 of the 7 daily checks it takes to print a share
Median first answer627 ms
Space in an agent's context≈ 1,237 tokensthe definitions of all its tools (7), which an agent carries on every turn
Tool definitionsB · 86 of 100

Parameters without a description: in 6 of 7

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The state of vendors' MCP servers: method and numbers →

Tools it offers7 tools · read 2026-10-18

get_historical_data
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…
get_rank
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/
harpd_compare
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…
harpd_optimize
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…
harpd_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…
search_products
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/
verify_agent_payment
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…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

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

OpenAPI spec

8 paths, read 2026-10-18. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.