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The real catalog of tools for AI agents

Google tells you what exists. Faceabot tells you what holds up.

44,737real tools
29,284callable over HTTPS
19,897measured
6,296proven reliable
JsonMend Reliable (measured) · 100% over 14 checks Fails real tasks · 0/14

Repair broken JSON from LLM output and validate it against a JSON Schema.

MCP endpoint : https://jsonmend.mike-tusa.workers.dev/mcp · website · measurements and details
AgentDiet Deterministic A2A Broken-JSON Repair & Schema Validator Being measured · 100% over 2 checks Real task being tested · 2/2

Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes).

MCP endpoint : https://json-repair.agentdiet.dev/mcp · website · measurements and details
Agent JSON Reliability Not measured yet

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

Package pypi : agent-json-reliability · website · measurements and details
AgentDiet — A2A Context Window Distiller & 85% Token Diet Being measured · 100% over 2 checks Real task being tested · 2/2

Prunes 85% of HTML/DOM/JSON token bloat into semantic Markdown for LLM agents via x402 & MPP on agentdiet.dev.

MCP endpoint : https://agentdiet.dev/mcp · measurements and details
JSONShelf Being measured · 100% over 2 checks

Deterministic JSON repair, validate, example-gen, schema-coerce for agents. Zero LLM, sub-10ms.

MCP endpoint : https://jsonshelf.vercel.app/mcp · website · measurements and details
json-schema-validator Reliable (measured) · 100% over 7 checks

Validates 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 details
GenPark Recursive JSON Schema Healer Not measured yet

Recursive JSON schema validator and autonomous healer repairing type mismatches, missing defaults, a

Package mcpb : https://github.com/Alpha-Park/genpark-recursive-json-schema-healer-skill/releases/download/v1.0.1/genpark-recursive-json-schema-healer-skill-v1.0.1.mcpb · website · measurements and details
json-repair Being measured · 0% over 1 checks

MCP server (stdio): repair broken/malformed JSON via the AgentForge API

MCP endpoint : https://apim-agentforge-6lfm33.azure-api.net/json-repair/mcp · measurements and details
FixMyJSON Reliable (measured) · 100% over 14 checks

Repair broken LLM JSON and check it against a JSON Schema. Flags cut-off output. Free trial.

MCP endpoint : https://fixmyjson-api.onrender.com/mcp · website · measurements and details
jsonaut Reliable (measured) · 100% over 3 checks

Repair malformed JSON from LLM/agent output; optional JSON Schema coercion. Free + x402 paid.

MCP endpoint : https://jsonaut.jsonaut-shaurya.workers.dev/mcp · website · measurements and details
AgentDiet B2A Email Deliverability, MX, SPF & DMARC Verifier Being measured · 100% over 2 checks Real task being tested · 2/2

Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMA.

MCP endpoint : https://email-verify.agentdiet.dev/mcp · website · measurements and details
Austin Oaks Payload Rescue Being measured · 50% over 2 checks

Repair malformed JSON that fails a schema. Deterministic only; refuses to guess; signed receipt.

MCP endpoint : https://ao-payload-rescue-production.up.railway.app/mcp · website · measurements and details
AgentDiet AI Token Diet & Context Window Distiller Being measured · 100% over 2 checks Real task being tested · 2/2

Strips 85-97% of HTML/DOM bloat into clean Markdown or JSON with cryptographic ROI proof.

MCP endpoint : https://agentdiet.dev/mcp · website · measurements and details
Contract Guard Private (key required)

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

MCP endpoint : https://contract-guard-production.up.railway.app/mcp · website · measurements and details
AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall Being measured · 100% over 2 checks Real task being tested · 2/2

Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections an.

MCP endpoint : https://prompt-guard.agentdiet.dev/mcp · website · measurements and details
validate Being measured · 50% over 2 checks

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

MCP endpoint : https://api.machinegrade.dev/mcp · website · measurements and details
AgentDiet Zero-Bloat A2A Live Web Search & Tech News Grounding Being measured · 100% over 2 checks Real task being tested · 2/2

Executes live Google News RSS + HackerNews Algolia search queries and returns clean, token-pruned.

MCP endpoint : https://serp-extract.agentdiet.dev/mcp · website · measurements and details
AgentDiet A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor Being measured · 100% over 2 checks Real task being tested · 2/2

Audits any remote agent or MCP URL for JSON-RPC compliance, latency SLA, OpenAPI schema, and HTTP.

MCP endpoint : https://x402-audit.agentdiet.dev/mcp · website · measurements and details
GenPark Streaming NDJSON & JSONL Schema Validator Not measured yet

Ultra-low-latency incremental line validator with chunk boundary reassembly and schema auditing

Package mcpb : https://github.com/Alpha-Park/genpark-streaming-ndjson-jsonl-schema-validator-skill/releases/download/v1.0.1/genpark-streaming-ndjson-jsonl-schema-validator-skill.mcpb · website · measurements and details
JSON Validator API Being measured · 0% over 1 checks

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

MCP endpoint : https://json-validator.api.klymax402.com/mcp · website · measurements and details

AI 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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