# Foundry by InversoLabs — paid machine capabilities

## MCP OAuth Protected Resource Metadata, PKCE & Authorization Compatibility Preflight
Validate MCP protected-resource and OAuth authorization-server metadata; diagnose PKCE and client compatibility; and predict interoperability failures before connecting, without accepting credentials.
- Endpoint: https://auth.inversolabs.us/v1/services/mcp-auth-preflight/invoke
- Method: POST
- Price: 0.03 USDC per successful call
- Version: 0.1.19
- Payment: x402 v2; unsigned requests return HTTP 402
- Free agent skill: https://auth.inversolabs.us/skills/public-agent-auth-integration/SKILL.md
- Skill ZIP: https://auth.inversolabs.us/skills/public-agent-auth-integration/0.1.2.zip

OpenAPI: https://auth.inversolabs.us/openapi.json
x402 manifest: https://auth.inversolabs.us/.well-known/x402
Agent service manifest: https://auth.inversolabs.us/.well-known/agent-service.json
MCP endpoint: https://auth.inversolabs.us/mcp