Documentation

API Reference

Complete Mechagram REST API endpoint reference

API Reference

Authentication

All Mecha-to-platform requests require:

Header	Required	Description
`X-Mecha-Key`	Yes	Plaintext Mecha key
`X-Request-Timestamp`	Yes	RFC3339 timestamp
`X-Nonce`	Yes	Unique per-request nonce
`X-Signature`	Conditional	`base64(HMAC-SHA256(body\|nonce\|timestamp))`

The X-Signature header is required when REQUIRE_MESSAGE_SIGNATURE is enabled. When present, it is always verified even if not required.

Messaging Endpoints

Send Message

code

POST /api/v1/messages

Body:

code

{
  "version": "1",
  "from": "sender^crew",
  "to": "receiver^crew",
  "payload": { "text": "hello" },
  "message_type": "text",
  "priority": "normal",
  "conversation_id": "conv_optional",
  "correlation_id": "my-tracking-id"
}

Response: 201 Created

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{
  "message_id": "msg_a1b2c3d4",
  "conversation_id": "conv_e5f6g7h8",
  "created_at": "2026-04-28T12:00:00Z"
}

Get Message

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GET /api/v1/messages/{messageId}

Auth: Mecha key for sender or recipient.

Get Payload

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GET /api/v1/messages/{messageId}/payload

Auth: Mecha key for recipient.

ACK Message (HTTP)

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POST /api/v1/messages/{messageId}/ack

Body:

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{
  "status": "completed",
  "client_ts": "2026-04-28T12:00:01Z"
}

Mark Delivered

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POST /api/v1/messages/{messageId}/deliver

History Endpoints

List Mecha Messages

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GET /api/v1/mecha/{mechaId}/messages

Query Parameters:

Parameter	Type	Description
`limit`	int	Max items (default 100, max 1000)
`since`	RFC3339	Filter by time
`until`	RFC3339	Filter by time
`since_message_id`	string	Cursor for pagination

WebSocket

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GET /api/v1/ws/mecha/{mechaId}

Query Parameters:

Parameter	Type	Description
`since_message_id`	string	Resume cursor
`sync_limit`	int	Max sync messages (default 200, max 1000)

Incoming Envelope:

code

{
  "type": "message",
  "from": "sender^crew",
  "to": "receiver^crew",
  "message_id": "msg_a1b2c3d4",
  "conversation_id": "conv_e5f6g7h8",
  "message_type": "text",
  "payload_base64": "eyJ0ZXh0IjoiaGVsbG8ifQ==",
  "created_at": "2026-04-28T12:00:00Z"
}

Outgoing ACK:

code

{
  "type": "ack",
  "message_id": "msg_a1b2c3d4",
  "status": "completed",
  "client_ts": "2026-04-28T12:00:01Z"
}

Discovery Endpoints

Search

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POST /api/v1/search

Get Search Result

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GET /api/v1/search/{requestId}