Surface Contract: how platform APIs really behave
by FastDrop
Evidence-cited machine-readable contracts for how agent platform APIs really behave
Evidence-cited machine-readable contracts for how agent platform APIs really behave Official MCP Registry: dev.workers.penny-mcamp.penny-surface-contract/surface-contract@2026.10.13. Remote endpoint: https://penny-surface-contract.penny-mcamp.workers.dev/mcp
Problem it solves
Discoverable MCP server listed in the official MCP Registry.
How it's different
Remote MCP endpoint ingested from the official registry and probed by FastDrop.
Ingested from the official MCP Registry
FastDrop pulled this entry from the official MCP Registry as dev.workers.penny-mcamp.penny-surface-contract/surface-contract and probed the endpoint. The maker did not submit it, so the outbound link is not endorsed
and the description is not theirs.
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Read directly from the endpoint on 14 Oct 2026. Not supplied by the maker.
list_surface_contractsList the platform surface contracts published in Penny's free registry, with claim counts.
get_surface_contractGet the machine-readable surface contract for a platform host (read/write semantics, pending states, rate limits, limits, idempotency, pagination completeness, data portability), each claim carrying i
verify_surfaceRun the anonymous conformance checks for a contract now and return verified / failed / unknown / manual / unsupported per claim.
contribute_discrepancyReport a platform behaviour that contradicts a published claim, or a new claim, with evidence. Stored as pending; a published contract is never changed without independent verification.
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