Country Calling Codes
Look up E.164 dial codes, ISO country codes, regions, trunk prefixes, and NANP area codes from your agent while building signup, SMS, or telephony features.
Overview
Country Calling Codes MCP is a MCP server for the Build phase that lets agents look up country calling codes, ISO codes, E.164 dial codes, regions, trunk prefixes, and NANP area codes via countrycalling.codes.
What is this MCP server?
- lookup_country_calling_code MCP tool
- E.164 dial codes, ISO codes, regions, trunk prefixes
- NANP area code coverage
- Remote streamable-http endpoint at countrycalling.codes
- OpenAPI and llms.txt documentation on countrycalling.codes
- MCP server version 1.0.0
- 1 documented tool: lookup_country_calling_code
- Remote MCP URL https://countrycalling.codes/api/mcp
What problem does it solve?
Builders waste time guessing dial codes and NANP rules when implementing phone fields, SMS, or verification without a trusted lookup API in the agent loop.
Who is it for?
Indie devs shipping international phone capture, OTP SMS, or CRM dial fields who want live reference data inside the agent.
Skip if: Products with no telephony or geographic phone requirements, or teams blocked from calling external HTTP MCP remotes.
What do I get? / Deliverables
After you add the remote MCP endpoint, your agent can return correct calling-code and region metadata while you code integrations.
- Agent-callable country and dial-code lookups
- Aligned ISO, region, and trunk-prefix answers for implementation
- Fewer manual lookups during phone UX work
Recommended MCP Servers
Journey fit
Reference telephony data is needed during implementation of phone inputs, validation, and carrier integrations. Integrations is the right shelf for MCP servers that expose a hosted reference API to the agent during backend or UX work.
How it compares
Hosted reference-data MCP, not a local libphonenumber wrapper skill.
Common Questions / FAQ
Who is Country Calling Codes MCP for?
Builders implementing phone numbers, SMS, or regional validation who want agents to query live calling-code reference data.
When should I use Country Calling Codes MCP?
Use it during Build integrations while designing E.164 formatting, country pickers, or NANP area-code logic.
How do I add Country Calling Codes MCP to my agent?
Register the streamable-http remote https://countrycalling.codes/api/mcp in your Claude Code, Cursor, or Codex MCP configuration.