California Bitcoin is an MCP server with 12 tools an agent can call, among them answer_bitcoin_question, answer_bitcoin_question_with_evidence, batch_bitcoin_research. It answers at https://californiabitcoin.org/mcp?source=official-mcp-registry over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 12 September 2026; the last check, on 24 October 2026, succeeded.
Bitcoin research for AI agents: free answers, specialist Q&A, verification, evidence, timelines.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
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 fal Inputs: query |
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 qualificati Inputs: query |
batch_bitcoin_research | PAID 2.50 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 distin Inputs: items |
build_bitcoin_timeline | PAID 0.50 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 ch Inputs: query, fromYear, toYear, limit |
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 call Inputs: checkpointId, expectedDigest |
deep_ground_bitcoin | PAID 1.00 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, tempo Inputs: query |
get_bitcoin_evidence_pack | PAID 0.50 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, p Inputs: query |
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 whe Inputs: id |
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 a Inputs: query, limit |
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. Choose Inputs: task |
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 o Inputs: query |
verify_bitcoin_claim | PAID 0.50 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 s Inputs: claim |
Every block below points at https://californiabitcoin.org/mcp?source=official-mcp-registry. Pick your client and copy.
claude mcp add --transport http california-bitcoin https://californiabitcoin.org/mcp?source=official-mcp-registry
{
"mcpServers": {
"california-bitcoin": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://californiabitcoin.org/mcp?source=official-mcp-registry"]
}
}
}{
"mcpServers": {
"california-bitcoin": {
"url": "https://californiabitcoin.org/mcp?source=official-mcp-registry"
}
}
}{
"servers": {
"california-bitcoin": {
"type": "http",
"url": "https://californiabitcoin.org/mcp?source=official-mcp-registry"
}
}
}{
"context_servers": {
"california-bitcoin": {
"url": "https://californiabitcoin.org/mcp?source=official-mcp-registry"
}
}
}{
"mcpServers": {
"california-bitcoin": {
"serverUrl": "https://californiabitcoin.org/mcp?source=official-mcp-registry"
}
}
}{
"mcpServers": {
"california-bitcoin": {
"url": "https://californiabitcoin.org/mcp?source=official-mcp-registry"
}
}
}name: California Bitcoin
version: 0.0.1
schema: v1
mcpServers:
- name: California Bitcoin
type: streamable-http
url: https://californiabitcoin.org/mcp?source=official-mcp-registry{
"mcpServers": {
"california-bitcoin": {
"httpUrl": "https://californiabitcoin.org/mcp?source=official-mcp-registry"
}
}
}{
"mcpServers": {
"california-bitcoin": {
"type": "http",
"url": "https://californiabitcoin.org/mcp?source=official-mcp-registry"
}
}
}{
"mcpServers": {
"california-bitcoin": {
"url": "https://californiabitcoin.org/mcp?source=official-mcp-registry"
}
}
}goose://extension?url=https%3A%2F%2Fcaliforniabitcoin.org%2Fmcp%3Fsource%3Dofficial-mcp-registry&type=streamable_http&id=california-bitcoin&name=California%20Bitcoin
It answered our last check on 24 October 2026 in 501 ms. Over 6 checks since 12 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by californiabitcoin.org and served from californiabitcoin.org, the vendor's own domain: https://californiabitcoin.org/mcp?source=official-mcp-registry.
12, as returned by the server's own tools/list on 23 September 2026: answer_bitcoin_question, answer_bitcoin_question_with_evidence, batch_bitcoin_research, build_bitcoin_timeline, check_bitcoin_evidence_checkpoint, deep_ground_bitcoin, get_bitcoin_evidence_pack, get_bitcoin_topic, and 4 more.
It answered our last check on 24 October 2026 in 501 ms. Over 6 checks since 12 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://californiabitcoin.org/mcp?source=official-mcp-registry. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: org.californiabitcoin. Endpoint host: californiabitcoin.org. ARD identifier: urn:air:org.californiabitcoin:mcp:agent-commerce.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.