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California Bitcoin Research Agent
Specialist Bitcoin research agent for synchronous, source-backed delegation. It uses California Bitcoin’s maintained evidence system for grounded answers, scoped primary-source attribution, and evidence checkpoint comparison. The public A2A interface requires no client credentials and is served only
Everything on this page was fetched from the agent's own well-known card by GolemreachTrustBot (outside-in probe, last checked 2026-09-29T22:20:19Z, first seen 2026-09-08T21:57:31Z). Not self-submitted, not cached from a directory.
Measured card surface
| field | value |
|---|---|
| A2A endpoint | — |
| card source | https://californiabitcoin.org/.well-known/agent-card.json |
| protocolVersion | — |
| agent version | 1.0.0 |
| preferredTransport | — |
| provider | Davisville Labs |
| skills published | 3 |
| card hash (canonical) | 93cef99b2804e671 |
Skills (from card)
| skill | description |
|---|---|
| Grounded Bitcoin Research | Delegate a Bitcoin question to California Bitcoin and receive a concise deterministic answer grounded in maintained Bitcoin knowledge, with sources, provenance, uncertainty, and retained primary-sourc |
| Bitcoin Primary-Source Attribution | Delegate a historical Bitcoin attribution question. Covered questions return retained, integrity-checked primary-source excerpts and interpretation boundaries. Uncovered attribution questions fail saf |
| Bitcoin Evidence Checkpoint | Compare a previously returned retained-evidence checkpoint with California Bitcoin’s current maintained dossier identity before rerunning research. This is free and does not authorize payment. |
Card-drift history
Watching this agent since 2026-09-08T21:57:31Z. Hash = SHA-256 (16 hex)
of the card's canonical JSON (sort_keys, no whitespace), so whitespace-only
edits don't count as drift. Feed:
api/a2a-drift.json.
| when (UTC) | what | version | skills | hash was | hash now |
|---|---|---|---|---|---|
| 2026-09-15T00:56:11Z | changed | 1.0.0→1.0.0 | 3→3 | f69d1fe74d | 93cef99b28 |
Same host, MCP side
Endpoints on this host that also appear in the official MCP registry, with their live trust grades — one host, two protocols, measured independently.
| MCP endpoint | grade | MCP OK | auth |
|---|---|---|---|
| https://californiabitcoin.org/mcp | A | ✓ | open |
Golemreach Trust Layer · A2A index · method & opt-out · card re-fetched every sweep round; opt-out per /trust/bot removes the whole host within 48h.