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Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit
MCP endpoint :https://check-digit.gumballtools.com/api/mcp · website · measurements and detailsValidates CPF (check digits) and discovers lawsuits by CPF, searching by NAME in the official gazett
MCP endpoint :https://api.mcp.ai/p_cpf · website · measurements and detailsUPC-A check-digit shape, value discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/upc-check/mcp · website · measurements and detailsValidate and prepare CSV; reconcile two tables with exact keys and full findings. Fixed free demos.
MCP endpoint :https://check.orvel.dev/mcp · website · measurements and detailsCheck an MCP endpoint resolves: liveness, live tool list, schema drift. Free.
MCP endpoint :https://mcp-uptime.theopslog.workers.dev/mcp · measurements and detailsJSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.
MCP endpoint :https://json-validator.api.klymax402.com/mcp · website · measurements and detailsScore MCP tool definitions 0-100. Checks names, schemas, annotations, and uniqueness.
MCP endpoint :https://wildrunai.com/api/mcp · website · measurements and detailsData marketplace for AI agents: quality-scored datasets, compliance checks, x402 USDC payments.
MCP endpoint :https://ugduocbgwoqoiyyjdnzr.supabase.co/functions/v1 · website · measurements and detailsdigit run count, text discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/digit-n/mcp · website · measurements and detailsISBN digit shape
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/isbn-shape/mcp · website · measurements and detailsISSN digit shape
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/issn-ok/mcp · website · measurements and detailsPremium agentic endpoint for chinese-scroll-digitizer-mcp.
MCP endpoint :https://api.m2mcent.com/chinese-scroll-digitizer-mcp/sse · measurements and detailsValidate HMDA LAR files against CFPB edit checks for community banks and credit unions.
MCP endpoint :https://api.clarid.ai/mcp · website · measurements and detailsEAN/UPC digit shape
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/ean-shape/mcp · website · measurements and detailsMCP de solo lectura del directorio, Radar y Observatorio de humanista.digital.
MCP endpoint :https://humanista-digital-mcp.vercel.app/api/mcp · website · measurements and detailsEBCDIC digit zone, input discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/ebcdic-ok/mcp · website · measurements and detailsUTC nanosecond 9-digit band
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/ns-utc/mcp · website · measurements and detailsSonyflake digit shape, value discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/sonyflake-ok/mcp · website · measurements and detailsVIAF digit id, value discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/viaf-ok/mcp · website · measurements and detailsFirma digital argentina (Ley 25.506) con certificados de certificador licenciado.
MCP endpoint :https://firma.identik.me/api/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
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