Invoket
Description
Official MCP bridge to the Invoket x402 gateway: 68 pay-per-call endpoints (IBAN validation and sanctions screening, phone validation, French and EU law in force, weather and climate, medication data) exposed as typed tools, paid in USDC on Base with non-custodial BYOK spend…
About
Official MCP bridge to the Invoket x402 gateway: 68 pay-per-call endpoints (IBAN validation and sanctions screening, phone validation, French and EU law in force, weather and climate, medication data) exposed as typed tools, paid in USDC on Base with non-custodial BYOK spend caps.
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@invoket/mcpis theleast-friction wayto give an AI agent paid access to Invoket: one line of MCP host config and every paid endpoint becomes a typed tool your agent can call. It pays for calls automatically overx402— the agent never has to know the protocol.
The server runson your machineover stdio, launched by your MCP host (Claude Desktop, Claude Code, any MCP client).Invoket hosts nothing and never sees your key or your funds.The tools are generated live from the gateway’s discovery surfaces — nothing is hard-coded, so endpoints added or removed on the gateway appear or disappear on their own.
If you are wiring the raw x402 flow yourself instead of going through MCP, seeFor agentsand theQuickstart.
Anyone operating an agent that should be able toact— pay, message, advise, plan, buy — and needs the pre-action checks Invoket serves. If your runtime speaks MCP (Claude Desktop, Claude Code, an SDK agent, any MCP host), this is the path with the least code between your agent and a paid call.
This is apayerpackage, so trust is the product. Every guarantee below is enforced by the package itself; read the full threat model inSECURITY.mdand audit the source — it is small and dependency-light on purpose.
- Your key never leaves your machine.PAYER_PRIVATE_KEYis read once from the process environment and usedonlyto produce EIP-712 / EIP-3009 signatures locally. It is never transmitted, never written to disk, never returned in a tool result, and never logged — a global output scrubber redacts key-shaped material from every log line and error as a backstop.
- Spending is bounded before any signature.Three independent checks runbeforea payment is signed, and any breach is a hard refusal:MAX_PRICE_USD(per-call ceiling),SESSION_BUDGET_USD(per-session budget, in memory), and a check that the402challenge amount never exceeds the price published by discovery — the gateway cannot quietly overcharge.
- Single origin, no arbitrary fetch.Every request goes to the one configured origin (INVOKET_BASE_URL, HTTPS enforced except on localhost). No model-driven input can make the server fetch another URL.
- No persistent state, no telemetry.Nothing is written to disk; spend counters live in memory for the session only.
Use a dedicated, low-balance wallet.The spend caps bound per-call and per-session cost, but your hard exposure ceiling is simply the balance of the wallet whose key you provide. Never point this at a primary or high-value wallet.
You needNode.js ≥ 20. There is no install step — your MCP host runsnpx -y @invoket/mcp. To makepaidcalls you also need a funded EVM wallet (USDC on Base). To only browse the catalog and try free trial calls, omit the key entirely and the server starts indiscovery-only mode.
Editclaude_desktop_config.json(Settings → Developer → Edit Config), then restart Claude Desktop:
{ "mcpServers": { "invoket": { "command": "npx", "args": ["-y", "@invoket/mcp"], "env": { "PAYER_PRIVATE_KEY": "0xYOUR_DEDICATED_WALLET_KEY", "MAX_PRICE_USD": "10.00", "SESSION_BUDGET_USD": "10.00" } } } }
claude mcp add invoket \ --env PAYER_PRIVATE_KEY=0xYOUR_DEDICATED_WALLET_KEY \ --env MAX_PRICE_USD=10.00 \ --env SESSION_BUDGET_USD=10.00 \ -- npx -y @invoket/mcp
Any host that speaks MCP over stdio can launch the same command:
{ "command": "npx", "args": ["-y", "@invoket/mcp"], "env": { "PAYER_PRIVATE_KEY": "0xYOUR_DEDICATED_WALLET_KEY", "MAX_PRICE_USD": "10.00", "SESSION_BUDGET_USD": "10.00" } }
OmitPAYER_PRIVATE_KEYto run in discovery-only mode.
The two you will usually set arePAYER_PRIVATE_KEY(your dedicated wallet) and the spend caps. The rest have safe defaults.
- One typed tool per paid endpoint, generated from discovery: the name is derived from the path, the input schema from the endpoint’s published schema, and the price is stated in the description. When a call carries no payment (a trial or free call), the result reportspaid: false— your agent always knows whether a call cost anything.
- Free platform tools, always available and never charged:
- search_endpoints— full-text search over the discovered catalog; go from an intent to the right paid tool.
- wallet_status— payment mode, payer public address, configured caps and session spend (never the private key, never an on-chain balance).
- submit_review— send feedback (a gap, a bug, a pricing concern) to Invoket.
- platform_info— gateway origin, number of discovered endpoints, snapshot freshness and the last discovery error (use it to diagnose an empty tool list).
With no key, the server runs in discovery-only mode: browse the catalog and read schemas without paying. With a key, the first call each day to a trial-enabled endpoint is free (PREFER_TRIALdefaults totrue) and reportspaid: false. Which endpoints currently offer a trial is driven by the gateway’s/catalog, never hard-coded.
USDC on Base in v1. The payment rail is selected from the gateway’s402challenge; an unsupported requirement is refused with a clear message.
- npm —@invoket/mcp
- Source —github.com/Invoket/mcp
- Threat model —SECURITY.md
- Raw x402 flow (no MCP) —For agentsandQuickstart
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