dev.workers.penny-mcamp.penny-surface-contract/surface-contract

up checked 2026-11-11T04:37:41.850Z

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Publisher-provided title

Surface Contract: platform API behavior and x402 pre-payment checks

Publisher-provided description

Surface contracts: API behavior evidence, x402 pre-payment check, MCP server preflight

Summary by lookupd

Checks platform API behavior against published contracts, runs x402 pre-payment route checks, and verifies MCP server endpoints for agents.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http surface-contract https://penny-surface-contract.penny-mcamp.workers.dev/mcp

Codex, remote (streamable-http)

codex mcp add surface-contract --url https://penny-surface-contract.penny-mcamp.workers.dev/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "surface-contract": {
      "url": "https://penny-surface-contract.penny-mcamp.workers.dev/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (7 tools)

Publisher-provided text

• list_surface_contracts List the platform surface contracts published in Penny's free registry, with claim counts.
• get_surface_contract Get the machine-readable surface contract for a platform host (read/write semantics, pending states, rate limits, limits, idempotency, pagination completeness,
• verify_surface Run the anonymous conformance checks for a contract now and return verified / failed / unknown / manual / unsupported per claim.
• contribute_discrepancy Report a platform behaviour that contradicts a published claim, or a new claim, with evidence. One-line call: POST /v1/contribute with {contractId, kind, statem
• get_integration_recipe Get a plain-text integration recipe for a platform: the order of operations to use it, and a guard clause for every behaviour we measured going wrong, each nami
• preflight_mcp_server Run the anonymous MCP handshake against ANY https MCP endpoint you name, right now, and get back a verdict (open / refused / unreachable / initialize-transport-
• prepay_check Check an x402 route BEFORE you pay it. GET /v1/prepay?url=<the route> makes ONE unpaid GET with no payment header and no credential, and returns one row: the me

Details

• Version: 2026.10.22
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 2155 ms
• First indexed: 2026-11-01T09:02:03.095Z
• Last seen in registry: 2026-11-01T09:02:03.105Z
• Website: https://penny-surface-contract.penny-mcamp.workers.dev/

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• Last crawl: 2026-11-11T18:39:04.612Z
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