California Bitcoin MCP server

• Registry nameorg.californiabitcoin/agent-commerceverified in the MCP registry

The registry name sits under californiabitcoin.org. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-26
• Tools12
• Server calls itselfcalifornia-bitcoin
• Server version1.2.0
• Protocol version2025-06-18

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 222 ms.

• Its tools do ask bitcoin questions and receive sourced answers, but not save reading and keep a personal library of resources.
• Checked on 2 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
• What an agent can do with it1 of 2 use cases
• Answeredmeasuring2 of the 7 daily checks it takes to print a share
• Median first answer436 ms
• Space in an agent's context≈ 3,624 tokensthe definitions of all its tools (12), which an agent carries on every turn
• Tool definitionsA · 100 of 100
• Typed results12 of 12 toolsdeclared outputSchema: results come typed, read once

• Every tool passes all six checks.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• start_bitcoin_research

  FREE. FREE, no account and no payment. START HERE with any Bitcoin question or research task. Returns a source-backed deterministic answer, compact maintained-coverage matches, and the smallest safe next action. This tool never authorizes…

• select_bitcoin_research_product

  FREE. FREE, no account required. Select a research product and inspect its price, free evaluation path, and contract using an explicit task: answer, verify, evidence, chronology, dossier, batch, or learn. Does not authorize payment…

• search_bitcoin_knowledge

  FREE. FREE, no account required. Search canonical Bitcoin Knowledge Atlas topics and related history to evaluate coverage on the caller's real question. Run the first no-cost evaluation when you need to see which maintained Bitcoin topics…

• get_bitcoin_topic

  FREE. FREE, no account required. Retrieve one canonical Knowledge Atlas topic with sources, provenance and related concepts. Inspect a known canonical topic in depth before deciding whether paid evidence packaging is necessary. Use only…

• answer_bitcoin_question

  FREE. FREE, no account required. Return a concise deterministic answer grounded in maintained Bitcoin knowledge. Covered historical attribution questions use retained, integrity-checked primary-source dossiers instead of generic topical…

• answer_bitcoin_question_with_evidence

  PAID 1.00 USD via MPP. Get a compact, source-backed answer to a difficult natural-language Bitcoin question using the maintained Fact Graph and evidence system, with consensus-vs-policy classification, implementation and version…

• check_bitcoin_evidence_checkpoint

  FREE. FREE, no account and no payment. Compare a previously returned retained-evidence checkpoint with the current maintained dossier content identity before deciding whether to rerun or repurchase covered historical research. A repeat…

• verify_bitcoin_claim

  PAID 0.10 USD via MPP. Evaluate one specific Bitcoin factual proposition against verdict-eligible maintained atomic claims and return a conservative supported, contradicted, mixed, partially verified, or insufficient-evidence verdict with…

• get_bitcoin_evidence_pack

  PAID 0.15 USD via MPP. Build a focused Bitcoin evidence package when the agent already knows what it is researching and primarily needs compact source material, atomic claims, conflicts, source authority, exact-locator precision, caveats…

• build_bitcoin_timeline

  PAID 0.10 USD via MPP. Build a query-specific chronological Bitcoin research timeline that distinguishes event dates, source dates, effective dates, source-level support, exact locators, and maintained re-verification boundaries. Use for…

• deep_ground_bitcoin

  PAID 0.25 USD via MPP. Produce a deeper deterministic multi-source Bitcoin research dossier across canonical topics, verdict-eligible atomic claims, contextual material, conflicting evidence, source hierarchy, exact-locator precision…

• batch_bitcoin_research

  PAID 0.50 USD via MPP. Process up to 20 distinct Bitcoin claims, questions, or evidence requests in one deterministic research package while preserving per-item verdict and evidence-quality semantics. Use when the caller has multiple…