Real-time fact-checking MCP. Verifies claims against live sources with structured verdicts.
Real-time fact-checking and data freshness agent. Verifies claims, URLs, and content against live web sources. Returns structured verdicts with confidence scores, what has changed, and supporting sources.
| Verdict | Meaning |
|---|---|
CURRENT | Claim is accurate and up to date |
OUTDATED | Claim was true but has since been superseded |
DISPUTED | Sources disagree — no clear consensus |
UNVERIFIABLE | No usable sources found |
{
"mcpServers": {
"verity": {
"command": "npx",
"args": ["verity-mcp"],
"env": {
"VERITY_PRIVATE_KEY": "0x..."
}
}
}
}
Get USDC on Base at coinbase.com/wallet.
| Tool | Description | Price |
|---|---|---|
verity_verify | Verify a claim or URL against live sources | 0.10 USDC |
verity_deep_check | Multi-angle thorough verification | 0.50 USDC |
verity_batch | Verify up to 10 claims at once | 0.75 USDC |
verity_agent | Natural language fact-checking | 0.10 USDC |
POST https://verity.basechainlabs.com/api/verify
Authorization: x402 (USDC on Base)
{
"claim": "Is GPT-4 still the most capable OpenAI model?",
"caller_id": "my-agent-id"
}
Response:
{
"verdict": "OUTDATED",
"confidence": 91,
"summary": "GPT-4 has been superseded by GPT-4o and o3.",
"what_changed": "OpenAI released GPT-4o (May 2024) and o3 (late 2024).",
"sources": [{ "url": "...", "title": "...", "published_date": "2025-01", "supports": "CONTRADICTS" }],
"checked_at": "2026-05-11T09:00:00Z",
"recommendation": "Update any content referencing GPT-4 as the most capable model."
}
Pass a consistent caller_id on every call. VERITY remembers topics you've checked, domains you monitor, and previous results — no re-sending context.
GET https://verity.basechainlabs.com/api/agent?agent-card=true
Built by BaseChain Labs
Source-derived launch command. Check the maintainer’s required arguments and credentials before running:
npx -y verity-mcpMerge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.
{
"mcpServers": {
"io-github-clawdio777-verity": {
"command": "npx",
"args": [
"-y",
"verity-mcp"
]
}
}
}Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.
Claude Desktop setup referenceverity-mcpnpmio.github.Clawdio777/verity works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.
~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.~/.cursor/mcp.jsonRestart Cursor for changes to take effect..vscode/mcp.jsonReload VS Code window for changes to take effect.~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect..mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.