AgentBIT MCP Server

Remote MCP server exposing 28+ pay-per-call API tools for AI agents — paid per request with USDC on Base via the x402 protocol (no accounts, no API keys, no subscriptions). First call is free for new wallets on most tools.

• Endpoint: https://agentbit.app/mcp (Streamable HTTP, JSON-RPC 2.0)
• Website / live catalog: agentbit.app · catalog.json · llms.txt
• Integrations guide: agentbit.app/integrations
• Buyer SDK (npm): x402-fetch-pay

Connect

Claude Desktop / any MCP client with remote server support:

{
  "mcpServers": {
    "agentbit": {
      "type": "streamable-http",
      "url": "https://agentbit.app/mcp"
    }
  }
}

tools/list works immediately. The agentbit_discover operation is free — search 7,000+ indexed x402 resources across the ecosystem without paying anything.

How payment works

Paid tools follow x402 v2: call a tool without payment and the response returns the exact payment requirements (price in USDC atomic units, network eip155:8453, pay-to address) as structured content. Sign an EIP-3009 USDC authorization with your agent's wallet and retry with the _payment argument — settlement is gasless for the buyer and runs through the Coinbase CDP facilitator. The x402-fetch-pay npm package does the whole loop in one call.

• Prices per call: $0.001 – $0.10 USDC
• First call free for brand-new wallets (tools priced ≤ $0.02)
• Volume discounts advertised in every 402 envelope (100 calls/30d → −10%, 1000 → −20%)
• Per-tool reliability stats (success rate, p50/p95 latency) published in the catalog

Tools

Tool	Price	What it does
web-search	$0.015	Live web search: ranked results with title, URL, snippet, date
web-extract	$0.005	Fetch a URL → clean text, markdown and links
structured-extract	$0.01	JSON-LD / OpenGraph / Twitter Card metadata from any page
feed-read	$0.005	Any RSS/Atom feed → normalized JSON (auto-discovery from HTML)
wiki-facts	$0.005	Wikipedia search + summary in 300+ languages
paper-search	$0.01	Academic search across OpenAlex, Crossref, arXiv with OA PDF links
reddit-search	$0.02	Search Reddit posts by keyword
company-enrich	$0.10	Company data from a domain: name, tech stack, socials
company-research	$0.10	One-call due-diligence dossier
business-identity	$0.003	Legal entity lookup via GLEIF (LEI)
email-deliverability	$0.03	Syntax, MX, SPF, DMARC, disposable detection
counterparty-risk	$0.05	Domain/company/email risk screening (DNS, SSL, reachability)
domain-intel	$0.02	RDAP registry intel: age, registrar, expiry, risk flags
dns-inspect	$0.01	Full DNS records + email-posture analysis (SPF/DMARC policies)
ip-intel	$0.01	ASN, network holder, prefix, country, abuse contact (RIPEstat)
url-threat-check	$0.01	Phishing heuristics + safe redirect trace + malware DB lookup
endpoint-monitor	$0.005	Health probe: status, latency, TLS expiry, security headers
sanctions-screen	$0.02	Name screening vs OFAC SDN + UN lists (refreshed daily)
wallet-screen	$0.02	Wallet address screening: sanctions + on-chain risk signals
token-risk	$0.02	ERC-20 audit on Base: verification, owner, holder concentration
vat-check	$0.02	LIVE EU VAT validation via VIES (official EC service)
financial-document	$0.02	IBAN validation + repair, EU VAT format checks
fx	$0.005	Live foreign-exchange rates
util-transform	$0.001	Hashing, JWT decode, base64, UUID, JSON/CSV/XML transforms
website-agent-readiness	$0.05	Audit a site for AI-agent readiness (robots.txt, llms.txt…)
x402-intelligence	$0.02	Market analytics for the x402 ecosystem
discover	$0.001	Search 7k+ indexed x402 resources with usage metrics
x402-inspect	$0.001	Lint any x402 endpoint/payment header against the v2 spec

Full, always-current list with schemas: catalog.json.

Also available as plain HTTP

Every tool is a REST endpoint under https://agentbit.app/v1/... speaking x402 v2 directly — indexed in Coinbase Bazaar, Agent402, x402 Arena and other x402 discovery services. The MCP server and the REST API are the same catalog.

Engineering notes

Real-world x402 integration write-ups on the AgentBIT blog: the EIP-712 domain-name trap, CDP JWT signing with Ed25519 in PHP, debugging Bazaar's extensions echo.

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Maintained by AgentBIT. This repository documents the remote server; the service itself runs at agentbit.app.