# 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 reference API are live and open source.

## For agents

- MCP tool: `get_score(vendor_id[, state])` → an Ed25519-signed score manifest
  (percent verified thumbs-up, Wilson 95% lower bound, sample size, and a
  provenance hash of the exact events used). The caller can verify the signature
  and recompute the number from public data, so trusting the server is never
  required.
- MCP server (open source, stdio transport): https://github.com/audiencescore/audiencescore/blob/main/reference-impl/src/mcp-server.js
- 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, and MCP server are live and open source. Verified scores
populate as issuers begin signing receipts. Two release gates remain before any
receipt signs a real transaction: an independent cryptographic review of the
receipt scheme, and per-vertical legal review.