generated: '2026-08-20'
method: provider-published
authored_by: Nylas
source: https://developer.nylas.com/.well-known/agent-card.json
description: >-
  Agent card served at /.well-known/agent-card.json on developer.nylas.com,
  advertised from an RFC 8288 Link header (rel="agent-card") on every page.
  Grade is measured against the A2A 1.0.0 AgentCard object using the same
  definitions applied elsewhere in this catalog: 'conformant' passes every
  structural check, 'near-conformant' is correctly shaped but omits optional
  fields, 'flavored' fails a hard check and is an agent card in spirit rather
  than in schema. This card is deliberately 'flavored'. Nylas does not operate an
  A2A JSON-RPC endpoint, so it declares no A2A protocolVersion and does not
  claim A2A protocol support. It is published at the A2A well-known path as a
  machine-readable discovery document for the interfaces Nylas does operate,
  which are Model Context Protocol and REST.
discovery:
  path: /.well-known/agent-card.json
  canonical: true
  host: developer.nylas.com
  link_header_rel: agent-card
conformance:
  spec: A2A 1.0.0
  grade: flavored
  protocol_version: null
  preferred_transport: STREAMABLE_HTTP
  deviations:
  - no-protocolVersion
  - non-a2a-transport
  - url-is-mcp-endpoint-not-a2a-service
  deviation_notes: >-
    no-protocolVersion: omitted on purpose rather than by oversight; declaring
    one would assert A2A protocol support that does not exist.
    non-a2a-transport: preferredTransport is STREAMABLE_HTTP, the MCP transport,
    not one of the A2A transports (JSONRPC, GRPC, HTTP+JSON). The REST
    interfaces are declared as HTTP+JSON.
    url-is-mcp-endpoint-not-a2a-service: url points at the hosted MCP server,
    following the same convention as the other agent cards in this catalog,
    rather than at an A2A service endpoint.
card:
  name: Nylas
  description: >-
    Agent-callable access to email, calendar and contacts across Gmail, Outlook,
    Exchange, iCloud, Yahoo and any IMAP provider.
  url: https://mcp.us.nylas.com
  version: 1.0.0
  documentation_url: https://developer.nylas.com/docs/dev-guide/mcp/
  provider: Nylas, Inc.
  skills: 10
  interfaces: 4
  regions:
  - us
  - eu
  security: bearer API key
  capabilities:
    streaming: false
    push_notifications: false
    state_transition_history: false
  file: nylas-agent-card.json
skills:
- id: email
  interfaces: [mcp, rest]
- id: calendar
  interfaces: [mcp, rest]
- id: availability
  interfaces: [mcp, rest]
- id: contacts
  interfaces: [rest]
- id: notetaker
  interfaces: [rest]
- id: scheduling
  interfaces: [rest]
- id: notifications
  interfaces: [rest]
- id: api-contract
  interfaces: [contract]
- id: documentation
  interfaces: [markdown]
- id: agent-skills
  interfaces: [skills]
related:
  mcp: mcp/nylas-mcp.yml
  well_known: well-known/nylas-well-known.yml
  api_catalog: https://developer.nylas.com/.well-known/api-catalog
  agent_skills: https://developer.nylas.com/.well-known/agent-skills/index.json
x-evidence:
  url: https://developer.nylas.com/.well-known/agent-card.json
  content_type: application/json
  note: >-
    Verbatim body saved alongside this manifest as nylas-agent-card.json. No
    field inferred. Every endpoint and skill endpoint declared in the card
    resolves.