About Truth Bear
Truth Bear is a hosted MCP server for agents and applications that need records from official public sources. Paid records include an independently recomputable hash and an Ed25519-signed citation; the service relays records without providing advice or adjudication.
Key features
- 01Official public-record retrieval
- 02Hash and citation verification
- 03Cross-source verification
- 04Coverage and freshness discovery
- 05USDC payment via x402
Use cases
- 01Checking official records with verifiable citations
- 02Verifying a record against its cited source
- 03Discovering available data before purchase
MCP support
Provides MCP tools for discovering coverage, verifying citations, and retrieving official records. Paid retrieval uses x402 payment challenges settled in USDC.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://api.truthbear.co/mcpclaude mcp add --transport http changchinfu-truthbear https://api.truthbear.co/mcp{"mcpServers":{"changchinfu-truthbear":{"type":"http","url":"https://api.truthbear.co/mcp"}}}Open in Cursor{"servers":{"changchinfu-truthbear":{"type":"http","url":"https://api.truthbear.co/mcp"}}}Open in VS Code{"mcpServers":{"changchinfu-truthbear":{"type":"http","url":"https://api.truthbear.co/mcp"}}}{"mcpServers":{"changchinfu-truthbear":{"serverUrl":"https://api.truthbear.co/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
5| Parameter | Type | Required | Description |
|---|---|---|---|
| record_hash | string | Yes | sha256:<64 hex>, or a >=8-hex prefix as posted publicly |
Details
From the project READMETruth Bear — verifiable official-source data for AI agents (MCP)
Neutral, third-party access to official public records — US federal agencies, named registries and standards bodies — where every paid record ships an offline-recomputable record_hash and an Ed25519-signed citation. Pay per call in USDC via x402. No account, no API key.
Truth Bear restates official records faithfully; it does not adjudicate, advise, or endorse. The authoritative source is the official publisher named in every citation — verify and dispute there.
Add it (remote MCP server)
{
"mcpServers": {
"truthbear": { "url": "https://api.truthbear.co/mcp" }
}
}
JSON-RPC 2.0 over HTTP POST (initialize / tools/list / tools/call). No key needed to list or verify; paid tools return a real x402 payment challenge you settle from your own wallet.
Tools
| Tool | Cost | What it does |
|---|---|---|
find_signal | FREE | Coverage + freshness: which signals exist, queryable before you pay |
verify_citation | FREE | Check a record_hash, get the official reverse-lookup |
purchase_options | FREE | How to pay for a listed endpoint |
verify_triangular | FREE | Cross-verify one interwoven official line |
get_official_record | x402 | Returns a real payment challenge; pay, then receive the signed official record |
What you pay for
Not the raw public number (free at its source) — the aggregation + official-source provenance + offline cryptographic verifiability, pre-joined into one schema.
Verify offline, against the primary source
Every paid record carries a record_hash (canonical sha256, independently recomputable) and an Ed25519 citation. SEC-filing settlement evidence also ships a durable_anchor (an immutable SEC accession + permanent document URL) that re-verifies at any time, not only at read time.
Coverage (90 industries)
Macro (FRED / US Treasury / BLS), energy (EIA), weather & disaster (NOAA / USGS / NWS / SPC / FEMA), health (openFDA / CDC), sanctions (OFAC / EU), trade (USITC), SEC EDGAR filings, and more.
Try it
# free: what exists
curl https://api.truthbear.co/manifest
# free: MCP tool list
curl "https://api.truthbear.co/manifest?platform=mcp"
# settlement evidence feed (x402, $0.01): did an issuer file a form before a cutoff?
curl "https://api.truthbear.co/resolve/proposer?entity=AAPL&form=10-K&cutoff=2025-11-15"
Terms
Third-party relay of official records plus cross-source analysis. We warrant faithful relay (the hash recomputes against the cited official source), not the correctness of the source itself. Reference only — not advice, not adjudication, not a market resolution; the independent judgement and decision are the user's own. Full provider notice: https://api.truthbear.co/terms
Links
- MCP endpoint: https://api.truthbear.co/mcp
- Manifest: https://api.truthbear.co/manifest
- Capability / discovery: https://api.truthbear.co/.well-known/x402 · https://api.truthbear.co/llms.txt
- Terms: https://api.truthbear.co/terms
License
MIT (this listing/readme). The API itself is a hosted service governed by the Terms above.
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.