x402-discovery-mcp
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| WALLET_ADDRESS | No | Base wallet address that receives USDC payments (optional, has default) |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {
"listChanged": false
} |
| prompts | {
"listChanged": false
} |
| resources | {
"subscribe": false,
"listChanged": false
} |
| experimental | {} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| x402_discoverA | Find x402-payable services by capability or keyword. Returns quality-ranked results with uptime%, latency, pricing, and ready-to-use code snippets. This tool itself costs $0.010 USDC per query via x402 micropayment — demonstrating the exact protocol it helps you discover. |
| x402_browseA | Browse all registered x402 services, optionally filtered by category. Free, no payment required. Returns full catalog with quality signals. |
| x402_healthB | Check real-time health status of any registered x402 service. Free, no payment required. |
| x402_registerA | Register a new x402 service with the discovery index. Free. Your service will appear in the catalog and be discoverable by agents. |
| x402_attestA | Fetch a signed discovery attestation (EdDSA JWT) for a registered x402 service. The attestation contains cryptographically signed quality measurements: uptime %, avg latency, health status, and facilitator compatibility. Verify the signature offline using the JWKS at GET /jwks. Part of the ERC-8004 coldStartSignals spec (coinbase/x402#1375). |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
TDQS
Scored across 5 tools
x402_browse and x402_discover both return service lists, but browse is a free full-catalog view while discover is a paid keyword search with ranking and code snippets. Health and attest are related to status but distinct: real-time health check vs signed quality attestation.
All tools share a consistent x402_ prefix followed by a single word. Most are imperative verbs (discover, browse, register, attest), while health is a noun, but it clearly maps to a health-check action, so the pattern remains predictable.
Five tools is well-scoped for a discovery-focused server: search, catalog browsing, health checking, registration, and attestation. Each tool has a distinct job and none feels redundant.
The core discovery workflow is covered: search, browse, health, register, and signed attestation. The main gaps are managing existing registrations, such as updating or unregistering a service, but agents can still complete primary discovery tasks.