A2A Agent Card · Paubox

Paubox API Docs

Paubox serves an A2A Agent Card from its documentation host. The card is scoped to the documentation site rather than to the API hosts: name, url, provider and documentationUrl all point at https://docs.paubox.com/, and its single skill links to a Paubox-authored Agent Skill markdown file served from the same host. No card is served on www.paubox.com, api.paubox.com or mcp.paubox.com (all 404).

✓ Conformant with A2A 1.0.0. This card passes every structural check in the A2A specification’s AgentCard object — a capabilities object, a declared protocolVersion, and a well-formed skills array.
Provider: Paubox Conformance: Conformant Protocol: 0.3 Transport: HTTP+JSON Version: 1.0.0 Host: docs.paubox.com Skills: 1
Discovery

An A2A client finds this agent by fetching the well-known path on the provider's own host. That is what makes an agent card different from every other agent artifact in this catalog: it is provider-published by construction — it cannot be derived, generated, or reconstructed on a provider's behalf.

https://docs.paubox.com/.well-known/agent-card.json
Interfaces
https://docs.paubox.com/ · transport · protocol HTTP+JSON non-standard supportedInterfaces
Skills (1)

Paubox paubox

Use when building HIPAA-compliant email, marketing campaigns, or secure intake forms. Reach for this skill when agents need to send transactional email, manage subscriber lists, collect patient data via forms, check delivery status, or integrate Paubox into applications via REST API, SMTP, SDKs, CLI, or MCP Server.

Documentation
https://docs.paubox.com/
Evidence. Fetched 2026-08-26 from https://docs.paubox.com/.well-known/agent-card.json, HTTP 200. The body was saved verbatim and is the sole source for everything on this page — no field is inferred. View the captured card. Providers change what they serve; if this card has moved or changed shape, the provider profile carries the current state as of the last build.

Work with this as data

Every agent card here is available over the APIs.io API and to AI agents over MCP. A2A Agent Cards is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.

MCP server

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

https://apis.io/mcp

Tools for a2a agent cards

3 MCP tools reach this
  • 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

curl for this page
Search the catalog
curl "https://apis.io/api/v1/search?q=paubox&limit=10"
Everything under a tag
curl "https://apis.io/api/v1/tags/paubox"

Discovery needs no key. Ratings and market analysis are Pro.

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