dev.workers.penny-mcamp.penny-surface-contract/surface-contract
Surface Contract: how platform APIs really behave
Evidence-cited machine-readable contracts for how agent platform APIs really behave
alive probed 2026-10-15 · HTTP 200
6tools
1.3ktokens in Claude Opus 5.5
1.3ktokens in Claude Code
0.6 %of a 200k context window
736o200k_base estimate
853 msto initialize
556 msto list tools
- Endpoint
- https://penny-surface-contract.penny-mcamp.workers.dev/mcp (streamable-http)
- Host
- penny-surface-contract.penny-mcamp.workers.dev
- Protocol
- 2025-06-18
- Reports itself as
- penny-surface-contract 0.1.0
- Capabilities
- tools
- Instructions
- 476 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Website
- https://penny-surface-contract.penny-mcamp.workers.dev/
- Registry
- active, updated 2026-10-13 · registry entry
- Reachable
- 2 of the last 2 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| preflight_mcp_server | 275 | 37 % |
| contribute_discrepancy | 184 | 25 % |
| get_integration_recipe | 94 | 13 % |
| get_surface_contract | 92 | 13 % |
| verify_surface | 53 | 7 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-15 09:58 | alive | 1.4 s | 6 | 1.3k | 736 |
| 2026-10-14 09:17 | alive | 853 ms | 5 | 727 | 404 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/dev.workers.penny-mcamp.penny-surface-contract/surface-contract)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.