{"name":"Signal Forge Purchase Feedback","path":"/x402/feedback","url":"https://signalforgestudios.com/x402/feedback","method":"POST","payment_required":false,"description":"Free private feedback for a settled purchase. Use meta.request_id and meta.feedback.token from a new paid response. One immutable submission per request; identical retries are idempotent. Older purchases without tokens are not supported.","input_schema":{"type":"object","additionalProperties":false,"required":["request_id","token","usefulness"],"properties":{"request_id":{"type":"string","format":"uuid"},"token":{"type":"string","pattern":"^[a-f0-9]{64}$"},"usefulness":{"enum":["useful","partly_useful","not_useful"]},"comment":{"type":"string","maxLength":600}}},"privacy":"Stored privately with request ID and endpoint. Do not include credentials or personal data. Never published automatically."}