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{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"whoami","arguments":{}}} free no key
MCP endpoint :https://www.pathwren.workers.dev/c/mcp-registry-official/mcp/lint · website · measurements and detailsJSON Schema keyword count, body discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-schema-ok/mcp · website · measurements and detailsFree pilot: checked JSON Schema regression examples for a limited subset; no compatibility proof.
MCP endpoint :https://s6d4jqn7rlal7d9hkd64h7pn8o.ingress.hurricane.akash.pub/mcp · website · measurements and detailsValidate JSON against a schema with Ajv, infer a schema from samples and diff two schemas.
Package oci :ghcr.io/basitalisandhu/mcp-json-schema-tools:0.1.1 · website · measurements and detailsRead-only production error evidence for coding agents investigating failures.
MCP endpoint :https://mcp.volato.dev/mcp · website · measurements and detailsValidates JSON against a JSON Schema, lists violations. x402 payment required (testnet USDC).
MCP endpoint :https://faceted-napped-debtless.ngrok-free.dev/json-schema-validator/mcp · measurements and detailsMeaning of HTTP 500.
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-500/mcp · website · measurements and detailsReplay supplied records against old and new bounded JSON Schema draft-07 contracts. Receive exact...
MCP endpoint :https://mcp-factory.bowling-anthony.workers.dev/schema-change-gate/mcp · website · measurements and detailsBrowse the JSON Schema Store catalog. No key required.
Package npm :json-schema-store-mcp · website · measurements and detailsOffline, deterministic cause and fix for Node, npm, Next.js, CORS and Postgres URL errors.
Package npm :dev-error-explainers · website · measurements and detailsMCP server (stdio): validate JSON against JSON Schema (draft-07 / 2020-12) via the AgentForge API
MCP endpoint :https://apim-agentforge-6lfm33.azure-api.net/schema-validate/mcp · measurements and detailsLocal quantum error correction tools; decoder output verified against H c = s (mod 2).
Package mcpb :https://github.com/GuillaumeLessard/qector-claude-plugin/releases/download/v1.0.6/qector-claude-desktop-1.0.6.mcpb · website · measurements and detailsJSON Schema, TypeScript types, mocks for AI agents
Package npm :@rog0x/mcp-schema-tools · website · measurements and detailsStatically audits MCP tool surfaces for token cost, schema quality, and design issues.
MCP endpoint :https://mcplint-web.vercel.app/api/mcp · website · measurements and detailsVerify signed ALEX Evidence Packages. Fails closed on signature or schema errors.
Package pypi :alex-evidence-verify-mcp · website · measurements and detailsThe AI that understands raw data: Schema over your tables and databases, as MCP tools.
MCP endpoint :https://mcp.schemalabs.ai/mcp · website · measurements and detailsThe 2026-07-28 MCP revision removed the initialize handshake, sessions, ping and 4 more RPCs. 27 rul
Package npm :@readystack/mcp-2026-migration-lint · website · measurements and detailsJSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.
MCP endpoint :https://json-validator.api.klymax402.com/mcp · website · measurements and detailsLint MCP tool schemas for cross-client compatibility and agent preflight safety.
Package npm :mcp-lint · website · measurements and detailsMCP conformance test harness. JSON-RPC, OAuth 2.1 PKCE, schemas, smoke, annotations. CLI + lib.
Package npm :mcp-protocol-conformance · website · measurements and detailsAI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt
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