Public MCP report

Harpd Agent Data

https://api.harpd.com/mcp

Official Registry

Official Registry · com.harpd/agent-data · Publisher namespace: com.harpd

Server checked today at 20:57 UTC

Catalog verified today at 17:46 UTC

7 public tools observed. Tools were not executed.

Reachable · public catalog

What Talandor observed

The server answered

Add the endpoint to a compatible client below. A Watch can alert you if this public catalog changes.

This is a public protocol and tools/list check, not a functional validation.

https://api.harpd.com/mcp

AvailabilityReachablemeasured

Tools7 public tools observedmeasured

CompatibilityEstimated from published client rules · not a hands-on testestimated

Recent changeEarlier tool removal recordedHistorical

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How to use this MCP

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Assistant

Open the official client guide (opens in a new tab)

Compatibility evidence by assistant

Compatibility is estimated from published configuration rules and is not a hands-on test in each client.

Claude

Observed 2026-07-28.

Likely compatible · inferred

Cursor

Streamable HTTP and public HTTPS were observed.

Likely compatible · inferred

ChatGPT

Public tool names, descriptions and schemas were observed. Plan and workspace access still apply.

Likely compatible · inferred

VS Code

Public remote HTTP configuration can be assessed.

Likely compatible · inferred

Generic MCP

Observed 2026-07-28.

Likely compatible · inferred

Rule evidence: Remote HTTPS rule v0.2 · reviewed 2026-09-12 · Remote HTTP rule v0.2 · reviewed 2026-09-12 · Remote app rule v0.2 · reviewed 2026-09-12 · Protocol and transport rule v0.2 · reviewed 2026-09-12

Check details

What changed

Public contract stable since Sep 22, 2026 · 5:46 PM UTC

Last check Sep 22, 2026 · 8:57 PM UTC · No semantic contract change since the previous complete snapshot.

Info

compare_products was removed

Historical change Sep 22, 2026 · 5:46 PM UTC · critical · high confidence · compare_products · Rule: tool-removed

Critical

optimize_model was removed

Historical change Sep 22, 2026 · 5:46 PM UTC · critical · high confidence · optimize_model · Rule: tool-removed

Critical

research_products was removed

Historical change Sep 22, 2026 · 5:46 PM UTC · critical · high confidence · research_products · Rule: tool-removed

Critical

A Watch would alert only if this change may affect uses of the selected client that depend on the changed tools.

This public timeline shows the latest check, the last 24 hours, and the most recent important change. Watch keeps 30 days.

See earlier changes

harpd_compare was added

Historical change Sep 22, 2026 · 5:46 PM UTC · info · high confidence · harpd_compare · Rule: tool-added

Info

harpd_optimize was added

Historical change Sep 22, 2026 · 5:46 PM UTC · info · high confidence · harpd_optimize · Rule: tool-added

Info

harpd_research was added

Historical change Sep 22, 2026 · 5:46 PM UTC · info · high confidence · harpd_research · Rule: tool-added

Info

optimize_model changed its title or description

Historical change Sep 22, 2026 · 11:32 AM UTC · info · high confidence · optimize_model · Rule: documentation-changed

Info

The notes above are for this connector.

Server-provided content. Tool names, descriptions and schemas below are copied from the MCP server. They may be in another language. Talandor does not translate or verify them.

Tools and declared exposure

Server annotations are declarations, not verified behavior.

Show 7 of 7 server-provided tool definitions

get_historical_data

Declared read-only

Show server-provided details

Harpd historical rank intelligence

Server description (copied; language not verified)

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 schema (server-provided preview — do not copy)

{
  "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_rank

Declared read-only

Show server-provided details

Harpd AI product rankings

Server description (copied; language not verified)

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 schema (server-provided preview — do not copy)

{
  "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
}

harpd_compare

Declared read-only

Show server-provided details

Harpd AI product comparison

Server description (copied; language not verified)

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 schema (server-provided preview — do not copy)

{
  "type": "object",
  "required": [
    "products"
  ],
  "properties": {
    "products": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 8,
      "minItems": 2
    }
  },
  "additionalProperties": false
}

harpd_optimize

Declared read-only

Show server-provided details

Harpd AI model cost optimization

Server description (copied; language not verified)

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 schema (server-provided preview — do not copy)

{
  "type": "object",
  "required": [
    "current_model",
    "task"
  ],
  "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_research

Declared read-only

Show server-provided details

Harpd AI product research

Server description (copied; language not verified)

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 schema (server-provided preview — do not copy)

{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "default": 15,
      "maximum": 50,
      "minimum": 1
    },
    "query": {
      "type": "string",
      "maxLength": 500,
      "minLength": 3
    }
  },
  "additionalProperties": false
}

search_products

Declared read-only

Show server-provided details

Harpd AI product search

Server description (copied; language not verified)

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 schema (server-provided preview — do not copy)

{
  "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
}

verify_agent_payment

Declared read-only

Show server-provided details

Harpd testnet payment smoke test

Server description (copied; language not verified)

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 schema (server-provided preview — do not copy)

{
  "type": "object",
  "properties": {
    "echo": {
      "type": "string",
      "maxLength": 200,
      "description": "Any string; returned unchanged so the caller can correlate the round trip."
    }
  },
  "additionalProperties": false
}

Evidence and limitations

Method: anonymous Streamable HTTP probe. We never invoke a tool.

Attempted protocols: 2026-07-28

Protocol2026-07-28

TransportStreamable HTTP

AuthNo authentication challenge observed

EvidencePublic contract observed

Total latency3209 ms

Response bytes9920

No diagnostic errors.

Observation history

Operational

Sep 22, 2026 · 8:57 PM UTC · stable since Sep 22, 2026 · 5:46 PM UTC

2026-07-28 · 7 tools · no change · 5 checks

Operational

Sep 22, 2026 · 5:00 PM UTC · stable since Sep 22, 2026 · 11:32 AM UTC

2026-07-28 · 7 tools · no change · 5 checks

Operational

Sep 22, 2026 · 8:50 AM UTC · stable since Sep 19, 2026 · 8:07 AM UTC

2026-07-28 · 7 tools · no change · 46 checks

Operational

Sep 19, 2026 · 12:35 AM UTC

2026-07-28 · 7 tools

Sep 22, 2026 · 5:46 PM UTC

Complete public contract · 2026-07-28 · 7 tools

e8c1f579d8fa

Sep 22, 2026 · 11:32 AM UTC

Complete public contract · 2026-07-28 · 7 tools

dbecd03673a1

Sep 19, 2026 · 8:07 AM UTC

Complete public contract · 2026-07-28 · 7 tools

a36aa000afa8

Sep 19, 2026 · 12:35 AM UTC

Complete public contract · 2026-07-28 · 7 tools

a36aa000afa8

Deep monitoring eligibility

Eligible for deep monitoring

A complete public tools/list contract was observed, so a future deep-monitoring baseline can be compared safely.

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Full Watch. Availability, protocol, auth and public tool contract changes can be compared.