Postal

Postal API

Postal provides an email delivery platform API documented at the official docs site.

Documentation GitHub

Other Resources

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APIsJSON

https://artifacts.apis.io/postal-server/apis.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

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This API

curl "https://apis.io/api/v1/apis/postal-server:postal-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

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A second provider on the same verified email joins the account you already have.