Google tells you what exists. Faceabot tells you what holds up.
Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.
MCP endpoint :https://payload-validator.gumballtools.com/api/mcp · website · measurements and detailsBuild and validate IndexNow payloads, check key files, and diff sitemaps into a submission list.
MCP endpoint :https://indexnow-toolkit-mcp.lipmichal.workers.dev/mcp · website · measurements and detailsHookline MCP — create webhook endpoints, inspect requests, and validate payloads from AI agents.
Package npm :@hookline/mcp · website · measurements and detailsValidate pixels, postbacks, conversion API payloads, and tracking URLs with spec-backed findings.
Package cargo :pixellint-mcp · website · measurements and detailsPremium agentic endpoint for base64-payload-decoder-mcp.
MCP endpoint :https://api.m2mcent.com/base64-payload-decoder-mcp/sse · measurements and detailsJWT header shape, payload discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/jwt-header/mcp · website · measurements and detailsKSUID payload charset, value discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/ksuid-pay/mcp · website · measurements and detailsRepair 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 detailsMeaning of HTTP 413.
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-413/mcp · website · measurements and detailsJWT header.payload.sig shape, value discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/jwt-hdr/mcp · website · measurements and detailsdata: URI media-type only, payload discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/data-uri-ok/mcp · website · measurements and detailsCloudflare Workers MCP server: api-payload-auditor
MCP endpoint :https://api.lazy-mac.com/api-payload-auditor/mcp · website · measurements and detailsAny video URL to LLM-ready transcript. ASR built in, no captions needed. TikTok, X, TED and more.
MCP endpoint :https://api.payload.cool/mcp/ · website · measurements and detailsValidiert E-Rechnungen (ZUGFeRD/Factur-X, XRechnung) gegen EN 16931 mit Korrekturvorschlägen.
MCP endpoint :https://api.zugferd-validator.de/mcp · website · measurements and detailsLatAm Validate MCP — validate Latin-American banking and tax identifiers.
MCP endpoint :https://gateway.pipeworx.io/latam-validate/mcp · website · measurements and detailsJSON validity
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-ok/mcp · website · measurements and detailsRegulatory compliance scanner validating SEC, FTC, and anti-spam rules.
MCP endpoint :https://legal-validator-mcp.vercel.app/api/mcp · measurements and detailsRegex matching, email/URL format validation, and JSON Schema validation.
MCP endpoint :https://apished.com/mcp/v1/validate · website · measurements and detailsScan a page for hidden prompt-injection payloads targeting AI agents.
MCP endpoint :https://cloakcheck-wheat.vercel.app/api/mcp · website · measurements and detailsPII scanning and redaction receipts for LLM traces and tool payloads.
MCP endpoint :https://tracepiishield.clauxel.com/mcp · 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
Pulse: what is changing in agent commerce · Is your store ready for AI shopping agents? · State of MCP (weekly) · MCP server doctor · Open reliability data · Add Faceabot to your AI · Help · Privacy · Terms