# AudienceScore

> An open protocol and MCP API for reviews gated by cryptographic proof of
> participation. A provider signs a receipt when a real transaction or verified
> participation happens; that receipt is the only thing that unlocks a review.
> Every published score is an Ed25519-signed, deterministic rendering over a
> public, append-only ledger that anyone can recompute — a verifiable trust
> signal an AI agent can safely act on, unlike scrapeable star ratings that are
> trivially faked. No receipt, no review; scores no one can buy. Established
> 2026; the protocol, spec, and pilot API are live and open source.

## For agents

- MCP tool: `get_score(offering)` → an Ed25519-signed v0.2 pilot rendering
  manifest with k-anonymity status, sample mix, dual views, and issuer
  disclosures. `get_score_evidence(offering)` returns de-identified input for
  independent recomputation. The caller can verify the signature and recompute
  the number from public data, so trusting the server is never required.
- MCP endpoint (hosted pilot, Streamable HTTP — connect by URL): https://mcp.audiencescore.org/mcp
- MCP server source (self-hostable Streamable HTTP): https://github.com/audiencescore/audiencescore/blob/main/reference-impl/src/mcp-http-server.js
- Pilot API: https://api.audiencescore.org
- Copy to LLM: https://api.audiencescore.org/docs/copy-to-llm
- Agent discovery (Agentic Resource Discovery): https://audiencescore.org/.well-known/ai-catalog.json
- MCP server card: https://audiencescore.org/.well-known/mcp/server-card.json
- Why attestation-gated data matters for agents: an AI buyer can be adversarially
  targeted by fake reviews. Only proof-gated, recomputable scores survive an
  agent-mediated market — they are the kind of signal a model can consume without
  being manipulated.

## Specs and code

- Protocol spec v0.2a (normative): https://github.com/audiencescore/audiencescore/blob/main/spec/SPEC-v0.2a.md
- Repository: https://github.com/audiencescore/audiencescore
- Governance (score math is open forever, by constitution): https://github.com/audiencescore/audiencescore/blob/main/GOVERNANCE.md

## Status

Open standard, established 2026. The protocol spec, reference implementation,
conformance vectors, MCP server, and hosted pilot API are live and open source.
Pilot deployment, pre-cryptographic-audit: the pilot ledger may be reset and
receipts re-issued after audit. Two release gates remain open for production
and non-pilot issuance: an independent cryptographic review of the receipt
scheme, and per-vertical legal review.