Find tools, APIs and agents your agent can use

41,803 listings · MCP servers 39,491 · paid HTTP APIs 1752 · kits 7 · 544 with payment-verified trust · updated 2026-10-12

Use it from your agent (free MCP server, no auth) · agents start at llms.txt

Add to Cursor Install in VS Code Claude Code More clients & SDKsServer URL: https://agentropolis.io/api/mcp

Featured · Agentropolis Pro (what's this?) · our own first-party kits as a showcase: no fee paid, no independent sales claimed

Payload Check — data-quality filter for agent payloads (JSON, code, scrapes, LLM output) kitno independent sales yet · 1 test sale disclosedPro · first-party showcaseVerifiedLive-Testedfirst_partyx402buy here · x402$0.03 USDC per call on Base via x402

Payload in → 0-100 quality score, pass/warn/fail, tags and issues before your agent uses it: broken/truncated JSON (auto-repair), JSON Schema mismatch, syntax errors, cut-off code, bot-challenge/captcha/404 scrapes, LLM refusals, placeholders, repetition loops, mojibake, ragged CSV. $0.03/check, deterministic, nothing stored.

https://seenly-payload-check.vercel.app · details · kit.json

Results (1,190) · organic ranking, no paid influence

Batcave Agent Services http_apiunclaimedx402from $0.003

2 pay-per-call endpoints on batcave-x402-gateway.darriel9.workers.dev. e.g. Batcave JSON Doctor: deterministic JSON repair plus optional structural schema validation without inventing missing values.

https://batcave-x402-gateway.darriel9.workers.dev · details · kit.json · claim

JSON Validator API mcp_serverunclaimed

JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.

https://github.com/Br0ski777/json-validator-x402 · details · kit.json · claim

Agent JSON Reliability mcp_serverunclaimed

Deterministic inspect, safe repair, and JSON Schema validation for agent JSON. No LLM.

https://github.com/toninovo4249-ai/agent-json-reliability · details · kit.json · claim

Jsonschema mcp_serverunclaimed

JSON Schema validation MCP.

https://pipeworx.io/packs/jsonschema · details · kit.json · claim

jsonguard http_apiunclaimedx402buy here · x402from $0.01

Repair malformed JSON and validate against a JSON Schema. POST malformed JSON (and an optional schema); returns repaired text, the parsed value, and validation errors. 0.01 USDC on Base per call via x402, no account.

https://jsonguard.leeworks.dev · details · kit.json · claim

JSON Schema Tools mcp_serverunclaimed

Validate JSON against a schema with Ajv, infer a schema from samples and diff two schemas.

https://basitalisandhu.github.io/dev-mcp-servers/ · details · kit.json · claim

JSON Schema keyword count, body discarded mcp_serverunclaimed

JSON Schema keyword count, body discarded

https://github.com/sadri-dridi/named-mcp-utilities · details · kit.json · claim

io.github.mrfentmen/json-schema-store-mcp mcp_serverunclaimed

Browse the JSON Schema Store catalog. No key required.

https://github.com/mrfentmen/json-schema-store-mcp · details · kit.json · claim

io.github.ryuamarines/json-schema-validator mcp_serverunclaimed

Validates JSON against a JSON Schema, lists violations. x402 payment required (testnet USDC).

https://faceted-napped-debtless.ngrok-free.dev/json-schema-validator/mcp · details · kit.json · claim

MakeStack Schema text→JSON http_apiunclaimedx402buy here · x402from $0.01

Schema text→JSON agent API — unpaid POST returns HTTP 402 with x402 PAYMENT-REQUIRED; settle Base USDC.

https://makestack.fun · details · kit.json · claim

Regex/Email/URL Validator mcp_serverunclaimed

Regex matching, email/URL format validation, and JSON Schema validation.

https://apished.com · details · kit.json · claim

Contract Guard mcp_serverunclaimed

Deterministic JSON Schema validation with exact violations and conservative type normalization.

https://contract-guard-production.up.railway.app/ · details · kit.json · claim

Queue Pilot mcp_serverunclaimed

MCP server for RabbitMQ and Kafka message inspection with JSON Schema validation

https://github.com/LarsCowe/queue-pilot#readme · details · kit.json · claim

Baserow Schema MCP mcp_serverunclaimed

Generic Baserow API client MCP server with automatic 2FA (TOTP) auth and OpenAPI validation.

https://github.com/aficiomaquinas/mcp-baserow-schema · details · kit.json · claim

io.github.CedricKouma/schema-validate mcp_serverunclaimed

MCP server (stdio): validate JSON against JSON Schema (draft-07 / 2020-12) via the AgentForge API

https://apim-agentforge-6lfm33.azure-api.net/schema-validate/mcp · details · kit.json · claim

io.github.machinegrade/validate mcp_serverunclaimed

Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.

https://api.machinegrade.dev · details · kit.json · claim

io.github.rog0x/schema mcp_serverunclaimed

JSON Schema, TypeScript types, mocks for AI agents

https://github.com/rog0x/mcp-schema-tools · details · kit.json · claim

io.github.Bristlecone2026/bristlecone-logic mcp_serverunclaimed

Micro-settled web content extraction and JSON schema validation utilities for AI agents via XRPL.

https://github.com/Bristlecone2026/bristlecone-logic · details · kit.json · claim

Schema Change Gate mcp_serverunclaimed

Replay supplied records against old and new bounded JSON Schema draft-07 contracts. Receive exact...

https://mcp-factory.bowling-anthony.workers.dev/schema-change-gate · details · kit.json · claim

TaskFleet http_apitrust 50unclaimedpaid_usage_verifiedx402buy here · x402from $0.01

Structured-data and data-access APIs for AI agents: web search (with recency filter) via Serper+Brave failover, JS-rendering scraper to clean Markdown or schema-driven JSON, on-chain Base wallet analysis (balances, holdings, activity tags), schema-validated JSON extraction, bulk translation, and structured code review. Every response is a guaranteed-valid JSON envelope. No account or API key — pay per call in USDC o…

https://taskfleet.net · details · kit.json · claim

Also search Coinbase Bazaar directly: Agentic.Market (link-out only; their terms forbid caching).