Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add PostOakLabs/ainumbers --skill mcp-server-self-attestgit clone --depth 1 https://github.com/PostOakLabs/ainumbersWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/postoaklabs/ainumbers/mcp-server-self-attest)<a href="https://agentmods.dev/skills/postoaklabs/ainumbers/mcp-server-self-attest"><img src="https://agentmods.dev/badge/skills/postoaklabs/ainumbers/mcp-server-self-attest/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/postoaklabs/ainumbers/mcp-server-self-attest"><img src="https://agentmods.dev/badge/skills/postoaklabs/ainumbers/mcp-server-self-attest.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00045 | $0.00528 |
| Opus 5.5 | $0.00018 | $0.00211 |
| Sonnet 5.5 | $0.00009 | $0.00106 |
| Haiku 4.5 | $0.00005 | $0.00053 |
Grade A, and why
mcp-server-self-attest scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 15d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
MCP server self-attest
Lint my MCP server, score readiness, and produce the self-attestation pack.
Prompt
Self-attest your MCP server with receipts instead of a checkbox.
- Call lint_mcp_server_conformance against your server endpoint. Record every violation with its rule id and severity.
- Call score_mcp_server_readiness. Record the score, the per-dimension breakdown, and the weakest dimension.
- Fix the conformance violations (or file them with owners). Fix nothing else this pass.
- Re-run both tools. Quote before/after per dimension; the score delta is your attestation claim.
- Rescan after one week without changes to confirm the score holds; that re-run is what makes it an attestation rather than a snapshot.
- build_session_receipt over all four runs; give me the ledger link.
- Write the self-attestation for your server's README or trust page: the score, the date, the rules checked, and the ledger link, so a client verifies the claim against the receipt rather than your wording. Call shape: every ChainGraph node tool takes its arguments nested under one wrapper object, e.g. {"policy_parameters": { ... }}; flat arguments are discarded by schema validation. If a named tool is not in your tool list, call call_tool with { "name": "", "arguments": { … } }. It runs the same validation and returns the same receipt.
How to run
Connect an MCP-capable host to https://mcp.ainumbers.co/mcp, then give the prompt above to the assistant.
Use synthetic inputs only. Never paste personal or production data.
Verify what came back
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 15d ago Changed d8a1097e8671
- 19d ago First seen · 40 lines · 45 tokens per session scan A 9b32c0b69543
mcp-server-self-attest is a skill published in the GitHub repository PostOakLabs/ainumbers (11 stars, last pushed yesterday), licensed MIT. It adds 45 tokens to every session and 528 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-27.
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