{"$comment":"Every number in this document is computed at request time from the same source of truth that serves the catalogue. Nothing here is a static claim. Each block carries verify_yourself so you do not have to trust this file.","subject":{"name":"Truth Bear","canonical_url":"https://api.truthbear.co","api_base":"https://api.truthbear.co"},"offer":{"resources":64,"price_from":"$0.005","price_max_per_call":"$9.9","settlement":"x402 - USDC on Base (and Solana on opt-in); no API key, no signup","verify_yourself":["https://api.truthbear.co/manifest?all=1","https://api.truthbear.co/.well-known/x402.json"]},"protocol":{"x402_v1_body":true,"x402_v2_header":"PAYMENT-REQUIRED","note":"Both versions are served on every paid endpoint. They are the SAME offer, not two competing ones. AgentGrade live-402 reads the v2 header; older v1 clients read the body.","bazaar_discoverable":true,"verify_yourself":"https://api.truthbear.co/gauge?signal_id=hydrology.river-level&entity=01646500  (expect HTTP 402 with both a body challenge and a PAYMENT-REQUIRED header)"},"schema_honesty":{"declared":64,"servable":64,"phantom":0,"note":"declared = resources advertising a schema; servable = schemas this server can actually produce right now. phantom must be 0.","verify_yourself":"https://api.truthbear.co/schemas/gauge.output.json  (and any other id from /manifest resources[].outputSchema.$ref)"},"cache_hygiene":{"paid_responses":"no-store, private, max-age=0","vary":["Accept","X-PAYMENT"],"why":"Without this, a caching proxy in front of the service can serve paid content to unpaid clients. Measured at 1000/1000 in published research against servers that omit it.","verify_yourself":"curl -sI https://api.truthbear.co/gauge?signal_id=hydrology.river-level&entity=01646500 | grep -i cache-control"},"record_verifiability":{"method":"canonical sha256 (record_hash) over a declared core; recomputable offline with zero network access","core_version":4,"supported_versions":[4,3,2,1],"offline_verifier":"https://api.truthbear.co/verify.mjs","free_crosscheck":"https://api.truthbear.co/gauge/verify?hash=<record_hash>","note":"You do not have to trust this server. Buy one record, recompute its hash locally, and compare. Older citations stay verifiable - all four core versions are accepted."},"identity":{"erc8004_registration":"https://api.truthbear.co/.well-known/agent-registration.json","a2a_agent_card":"https://api.truthbear.co/.well-known/agent-card.json","mcp":"https://api.truthbear.co/mcp","openapi":"https://api.truthbear.co/openapi.json","llms_txt":"https://api.truthbear.co/llms.txt"},"limits":{"not_offered":["Bitcoin / OpenTimestamps anchoring was discontinued 2026-07-23 and is NOT offered. Do not build verifiers against it.","No TEE attestation and no crypto-economic staking - supportedTrust is reputation only.","On-chain ERC-8004 identity is not registered yet; the registration file is discovery-only until it is."],"nature":"Descriptive only. Official-source facts and back-testable statistics. No judgement, no prediction, no recommendation to act.","no_data_policy":"When there is no data for your query the response is HTTP 422 with no_charge:true - you are not billed for an empty answer."},"generated_at":"2026-08-24T07:35:43.062Z"}