Koskamo

Harpd MCP

An MCP server providing access to Harpd's AI product discovery and ranking intelligence. It allows agents to search for products, retrieve live rankings, compare tools, conduct research, optimize listings, and query historical data. The server supports both free unauthenticated endpoints and paid per-request endpoints using x402 payment on Base.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Harpd MCP logo, by HarpdVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-06Operated by Harpd
MCP endpoint (Streamable HTTP)
https://api.harpd.com/mcp
Vendor documentation

What its tools do

7 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (7)

7 of 7 have a description · 7 of 7 declare behavior hints · 1 of 7 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Passed Official MCP Registry namespace is tied to harpd.com ·
  • Passed Endpoint is on the registry namespace domain ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Search for AI products and tools
  • Retrieve current product rankings
  • Compare multiple AI products
  • Query historical ranking data

Source and maintenance

Vendor evidenceRegistry 1.0.1
mcp-registry: com.harpd/agent-data@1.0.1

Protocol and capabilities

Server
harpd-agent-data 1.0.0
MCP protocol negotiated in check
2026-07-28
Tools
7 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Harpd sells AI product intelligence per call. Free tools: search_products, get_rank. Paid tools: harpd_compare, harpd_optimize, harpd_research, get_historical_data, verify_agent_payment. Paid tools return HTTP 402 with x402 payment requirements; no account, API key or registration is required.

Tools

7 advertised

get_historical_data — Harpd historical rank intelligence
Advertised by the server during the last successful anonymous check.
Advertised read-only

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/

get_historical_data input schema
{
  "type": "object",
  "required": [
    "product"
  ],
  "properties": {
    "scope": {
      "enum": [
        "overall",
        "monthly",
        "weekly"
      ],
      "type": "string",
      "default": "overall"
    },
    "period": {
      "enum": [
        "3m",
        "6m",
        "12m"
      ],
      "type": "string",
      "default": "12m"
    },
    "product": {
      "type": "string",
      "maxLength": 120,
      "minLength": 1,
      "description": "Harpd product slug, e.g. \"claude\"."
    },
    "category": {
      "type": "string",
      "default": "all"
    }
  },
  "additionalProperties": false
}
get_historical_data output schema
{
  "type": "object",
  "required": [
    "data",
    "meta"
  ]
}
get_historical_data annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
get_rank — Harpd AI product rankings
Advertised by the server during the last successful anonymous check.
Advertised read-only

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/

get_rank input schema
{
  "type": "object",
  "properties": {
    "limit": {
      "type": "integer",
      "default": 50,
      "maximum": 100,
      "minimum": 1
    },
    "scope": {
      "enum": [
        "overall",
        "monthly",
        "weekly"
      ],
      "type": "string",
      "default": "overall"
    },
    "category": {
      "type": "string",
      "default": "all"
    }
  },
  "additionalProperties": false
}
get_rank output schema
{
  "type": "object",
  "required": [
    "data",
    "meta"
  ],
  "properties": {
    "data": {
      "type": "object"
    },
    "meta": {
      "type": "object"
    }
  }
}
get_rank annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
harpd_compare — Harpd AI product comparison
Advertised by the server during the last successful anonymous check.
Advertised read-only

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/

harpd_compare input schema
{
  "type": "object",
  "required": [
    "products"
  ],
  "properties": {
    "products": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 8,
      "minItems": 2
    }
  },
  "additionalProperties": false
}
harpd_compare output schema
{
  "type": "object",
  "required": [
    "data",
    "meta"
  ]
}
harpd_compare annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
harpd_optimize — Harpd AI model cost optimization
Advertised by the server during the last successful anonymous check.
Advertised read-only

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/

harpd_optimize input schema
{
  "type": "object",
  "required": [
    "task",
    "current_model"
  ],
  "properties": {
    "task": {
      "type": "string",
      "maxLength": 2000,
      "minLength": 3
    },
    "max_cost": {
      "type": "number",
      "exclusiveMinimum": 0
    },
    "constraints": {
      "type": "object",
      "properties": {
        "min_tier": {
          "enum": [
            "mini",
            "fast",
            "open",
            "reasoning",
            "flagship"
          ],
          "type": "string"
        },
        "providers": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "min_context_window": {
          "type": "integer",
          "minimum": 1000
        }
      },
      "additionalProperties": false
    },
    "current_model": {
      "type": "string"
    },
    "monthly_calls": {
      "type": "integer",
      "maximum": 100000000,
      "minimum": 1
    }
  },
  "additionalProperties": false
}
harpd_optimize output schema
{
  "type": "object",
  "required": [
    "data",
    "meta"
  ]
}
harpd_optimize annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
harpd_research — Harpd AI product research
Advertised by the server during the last successful anonymous check.
Advertised read-only

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/

harpd_research input schema
{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "default": 15,
      "maximum": 50,
      "minimum": 1
    },
    "query": {
      "type": "string",
      "maxLength": 500,
      "minLength": 3
    }
  },
  "additionalProperties": false
}
harpd_research output schema
{
  "type": "object",
  "required": [
    "data",
    "meta"
  ]
}
harpd_research annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
search_products — Harpd AI product search
Advertised by the server during the last successful anonymous check.
Advertised read-only

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/

search_products input schema
{
  "type": "object",
  "required": [
    "q"
  ],
  "properties": {
    "q": {
      "type": "string",
      "maxLength": 200,
      "minLength": 2
    },
    "limit": {
      "type": "integer",
      "default": 10,
      "maximum": 50,
      "minimum": 1
    },
    "category": {
      "type": "string"
    }
  },
  "additionalProperties": false
}
search_products output schema
{
  "type": "object",
  "required": [
    "data",
    "meta"
  ],
  "properties": {
    "data": {
      "type": "object",
      "required": [
        "query",
        "count",
        "results"
      ],
      "properties": {
        "count": {
          "type": "integer"
        },
        "query": {
          "type": "string"
        },
        "results": {
          "type": "array"
        }
      }
    },
    "meta": {
      "type": "object"
    }
  }
}
search_products annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
verify_agent_payment — Harpd testnet payment smoke test
Advertised by the server during the last successful anonymous check.
Advertised read-only

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/

verify_agent_payment input schema
{
  "type": "object",
  "properties": {
    "echo": {
      "type": "string",
      "maxLength": 200,
      "description": "Any string; returned unchanged so the caller can correlate the round trip."
    }
  },
  "additionalProperties": false
}
verify_agent_payment output schema
{
  "type": "object",
  "required": [
    "data",
    "meta"
  ]
}
verify_agent_payment annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (2 of 2 answered).

  1. 2026-11-06: 1 of 1 checks answered
  2. 2026-11-07: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
1286 ms
95th percentile latency
1286 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 1286 ms · metadata changed · 7 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http harpd-mcp https://api.harpd.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add harpd-mcp --url https://api.harpd.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable harpd-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "harpd-mcp": {
      "url": "https://api.harpd.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "harpd-mcp": {
      "type": "streamableHttp",
      "url": "https://api.harpd.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start harpd-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "harpd-mcp": {
      "type": "http",
      "url": "https://api.harpd.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http harpd-mcp https://api.harpd.com/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://api.harpd.com/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "harpd-mcp": {
      "serverUrl": "https://api.harpd.com/mcp"
    }
  }
}

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