X402 Bazaar MCP server

x402-bazaar-mcp

Hosted, no install: point any MCP client at https://402.com.tr/mcp — Streamable HTTP, one tool per catalogued service, no wallet held server-side. Or run it locally with npx as described below; both talk to the same catalog. The current tool list is always the server card; a number written here would be wrong the next time a service is added.

The Base token-safety toolkit for AI agents. An MCP (Model Context Protocol) server that gives your agent the checks it needs before it touches a Base token — including a 30-tool B20 (Base-native token standard) suite covering freeze/seize powers, policy changes, mint headroom and rebase history — which also covers all 13 of Coinbase's tokenized equities, telling a real issuance apart from a token merely wearing an equity ticker by reading who administers the transfer policy on chain rather than by consulting a list of addresses, so a newly issued one is recognised the day it appears — pre-trade GO/HOLD/STOP gates, honeypot & sellability checks, wallet + approval audits, sign-guard, prices and AI reports. Every paid API in the x402 Bazaar catalog, exposed as a callable tool (Claude Desktop, Cursor, Cline, Windsurf, VS Code, Coinbase AgentKit, custom agents).

Bind these first: pretradegate (any token), b20gate (Base-native B20 tokens), signguard (before signing a tx).

No wallet needed to start. Run it with no key, no token and no config at all and it uses the free tier — one free call/day on each service that offers one. Roughly a third of the catalogue does not: AI and metered services are always paid, and every entry in the catalogue says which it is under freeTier. When you outgrow that, a prepaid credit token keeps it walletless: one purchase, then every call is just an HTTP header. A wallet is only needed for the third mode, per-call payment.

Each tool call is otherwise backed by an x402 micro-payment in USDC on Base — no API keys, no subscriptions, no sign-up. The agent pays only for what it uses, typically fractions of a cent per call.

Works with zero config. Run it with no wallet and no token and it uses the free tier (one free call/day on each service that offers one, then a preview) — so an agent can try most of the catalogue instantly, and sees a priced 402 on the AI and metered tools rather than a surprise. Unlock unlimited paid calls with either a prepaid credit token (one x402 purchase up front, then no wallet or signing per call) or a wallet key.

How it works

https://402.com.tr/api/catalog and auto-registers one MCP tool per service.

1. On startup the server fetches the live catalog from

the endpoint, and returns the response.

1. When an AI agent calls a tool the server picks a payment mode (below), hits

HTTP 402 → pay USDC on Base → retry → return response, gasless for the payer (the facilitator pays gas).

1. In wallet mode the x402 flow is transparent:

Three payment modes (precedence order)

Shortened. The full README is on GitHub.