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Get the US federal tax numbers right, with the IRS document each one comes from.
MCP endpoint :https://tax.openkrill.app/mcp · website · measurements and detailsJapanese corporate number lookup using official National Tax Agency public data.
MCP endpoint :https://jp-corporate.plugrail.dev/mcp · website · measurements and detailsCurrent source-cited 2026 US tax constants and calculators for AI agents; every answer cites IRS.
MCP endpoint :https://verified-numbers.mcpize.run · website · measurements and detailsValidates Moroccan ICE and IF tax identification numbers.
MCP endpoint :https://tax-validator.onrender.com/mcp · website · measurements and detailsJapanese invoice/receipt OCR + tax registration-number (T-number) verification, via x402.
Package npm :denpyo-mcp · website · measurements and detailsVerify Korean business registration numbers (National Tax Service) — KYB for Korean counterparties …
MCP endpoint :https://hawker-gateway.fly.dev/mcp/kr-biz-check · measurements and detailsMCP server for Indian vehicle RTO: decode number plates, calculate road tax, check RTO offices.
Package npm :@samarth-23-eng/india-mcp · website · measurements and detailsNumber utilities MCP.
MCP endpoint :https://gateway.pipeworx.io/numbers/mcp · website · measurements and detailsRFC number shape
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/rfc-number-ok/mcp · website · measurements and detailsMach number to m/s at STP, number discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/mach-ms/mcp · website · measurements and detailsUTC ISO week number
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/week-number/mcp · website · measurements and detailsUTC century number
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/century/mcp · website · measurements and detailsiss-number MCP — wraps StupidAPIs (keyless — no credential needed)
MCP endpoint :https://gateway.pipeworx.io/iss-number/mcp · website · measurements and detailsmercury-number MCP — wraps StupidAPIs (keyless — no credential needed)
MCP endpoint :https://gateway.pipeworx.io/mercury-number/mcp · website · measurements and detailsphoenix-number MCP — wraps StupidAPIs (keyless — no credential needed)
MCP endpoint :https://gateway.pipeworx.io/phoenix-number/mcp · website · measurements and detailsyesterdays-number MCP — wraps StupidAPIs (keyless — no credential needed)
MCP endpoint :https://gateway.pipeworx.io/yesterdays-number/mcp · website · measurements and detailsISO/IEC standard number shape
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/std-number-ok/mcp · website · measurements and detailsISO week number
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/iso-week/mcp · website · measurements and detailsJulian day number
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/julian-day/mcp · website · measurements and detailsSemVer numbers only
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/semver-parse/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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