Creates one transmission and announces it to every live member.

POST

/v1/bridge/messages

• Reverse-proxied API origin

Authorizations

• bearerAuth

Request Body^required

Media typeapplication/json

A transmission to send.

object

body

required

Base64 sealed body, exactly the width the character limit implies.

string

epochId

required

Base64 fingerprint of the key it was sealed under, which must be one the sender holds.

string

Example^generated

{
  "body": "example",
  "epochId": "example"
}

Responses

201

Stored and broadcast

Media typeapplication/json

One transmission on the Orbit command bridge, as stored and as broadcast. The server holds no key for it: body is opaque here and everywhere.

object

authorId

Who transmitted, or absent once that account is deleted. The words stay until they age out; the attribution goes at once.

string format: uuid

body

required

Base64 sealed body, padded to one fixed width before sealing so its length says nothing about what was typed.

string

createdAt

required

string format: date-time

epochId

required

Base64 fingerprint of the key this was sealed under.

string

seq

required

The bridge’s total order. Also the page cursor and the client’s last-seen marker, so all three can never disagree.

integer format: int64

Example^generated

{
  "authorId": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0",
  "body": "example",
  "createdAt": "2026-04-15T12:00:00Z",
  "epochId": "example",
  "seq": 1
}

Headers

Location

string

URL of the transmission

400

Invalid request

Media typeapplication/problem+json

RFC 9457 problem details payload.

object

detail

Explanation specific to this occurrence, written to help correct the request.

string

errors

The invalid members of the request. Present on a validation problem.

Array<object>

One invalid member of a request, located by a JSON Pointer (RFC 6901).

object

detail

required

What is wrong with it.

string

pointer

required

JSON Pointer to the member within the request body. Empty for the whole body.

string

status

required

HTTP status code.

integer format: int32

title

required

Short summary of the problem type. For about:blank, the status phrase.

string

type

Problem type URI, which resolves to its documentation. Absent means about:blank.

string

Example^generated

{
  "detail": "example",
  "errors": [
    {
      "detail": "example",
      "pointer": "example"
    }
  ],
  "status": 1,
  "title": "example",
  "type": "example"
}

401

No valid session token

Media typeapplication/problem+json

RFC 9457 problem details payload.

object

detail

Explanation specific to this occurrence, written to help correct the request.

string

errors

The invalid members of the request. Present on a validation problem.

Array<object>

One invalid member of a request, located by a JSON Pointer (RFC 6901).

object

detail

required

What is wrong with it.

string

pointer

required

JSON Pointer to the member within the request body. Empty for the whole body.

string

status

required

HTTP status code.

integer format: int32

title

required

Short summary of the problem type. For about:blank, the status phrase.

string

type

Problem type URI, which resolves to its documentation. Absent means about:blank.

string

Example^generated

{
  "detail": "example",
  "errors": [
    {
      "detail": "example",
      "pointer": "example"
    }
  ],
  "status": 1,
  "title": "example",
  "type": "example"
}

Headers

WWW-Authenticate

string

The Bearer challenge (RFC 6750).

402

Orbit required

Media typeapplication/problem+json

RFC 9457 problem details payload.

object

detail

Explanation specific to this occurrence, written to help correct the request.

string

errors

The invalid members of the request. Present on a validation problem.

Array<object>

One invalid member of a request, located by a JSON Pointer (RFC 6901).

object

detail

required

What is wrong with it.

string

pointer

required

JSON Pointer to the member within the request body. Empty for the whole body.

string

status

required

HTTP status code.

integer format: int32

title

required

Short summary of the problem type. For about:blank, the status phrase.

string

type

Problem type URI, which resolves to its documentation. Absent means about:blank.

string

Example^generated

{
  "detail": "example",
  "errors": [
    {
      "detail": "example",
      "pointer": "example"
    }
  ],
  "status": 1,
  "title": "example",
  "type": "example"
}

413

The body is too large

Media typeapplication/problem+json

RFC 9457 problem details payload.

object

detail

Explanation specific to this occurrence, written to help correct the request.

string

errors

The invalid members of the request. Present on a validation problem.

Array<object>

One invalid member of a request, located by a JSON Pointer (RFC 6901).

object

detail

required

What is wrong with it.

string

pointer

required

JSON Pointer to the member within the request body. Empty for the whole body.

string

status

required

HTTP status code.

integer format: int32

title

required

Short summary of the problem type. For about:blank, the status phrase.

string

type

Problem type URI, which resolves to its documentation. Absent means about:blank.

string

Example^generated

{
  "detail": "example",
  "errors": [
    {
      "detail": "example",
      "pointer": "example"
    }
  ],
  "status": 1,
  "title": "example",
  "type": "example"
}

415

The body is not JSON

Media typeapplication/problem+json

RFC 9457 problem details payload.

object

detail

Explanation specific to this occurrence, written to help correct the request.

string

errors

The invalid members of the request. Present on a validation problem.

Array<object>

One invalid member of a request, located by a JSON Pointer (RFC 6901).

object

detail

required

What is wrong with it.

string

pointer

required

JSON Pointer to the member within the request body. Empty for the whole body.

string

status

required

HTTP status code.

integer format: int32

title

required

Short summary of the problem type. For about:blank, the status phrase.

string

type

Problem type URI, which resolves to its documentation. Absent means about:blank.

string

Example^generated

{
  "detail": "example",
  "errors": [
    {
      "detail": "example",
      "pointer": "example"
    }
  ],
  "status": 1,
  "title": "example",
  "type": "example"
}

Headers

Accept

string

The media type the operation takes.

429

Inside the cadence

Media typeapplication/problem+json

RFC 9457 problem details payload.

object

detail

Explanation specific to this occurrence, written to help correct the request.

string

errors

The invalid members of the request. Present on a validation problem.

Array<object>

One invalid member of a request, located by a JSON Pointer (RFC 6901).

object

detail

required

What is wrong with it.

string

pointer

required

JSON Pointer to the member within the request body. Empty for the whole body.

string

status

required

HTTP status code.

integer format: int32

title

required

Short summary of the problem type. For about:blank, the status phrase.

string

type

Problem type URI, which resolves to its documentation. Absent means about:blank.

string

Example^generated

{
  "detail": "example",
  "errors": [
    {
      "detail": "example",
      "pointer": "example"
    }
  ],
  "status": 1,
  "title": "example",
  "type": "example"
}

Headers

Retry-After

string

Seconds to wait. Sent when the limit knows when it lifts.

500

The service failed

Media typeapplication/problem+json

RFC 9457 problem details payload.

object

detail

Explanation specific to this occurrence, written to help correct the request.

string

errors

The invalid members of the request. Present on a validation problem.

Array<object>

One invalid member of a request, located by a JSON Pointer (RFC 6901).

object

detail

required

What is wrong with it.

string

pointer

required

JSON Pointer to the member within the request body. Empty for the whole body.

string

status

required

HTTP status code.

integer format: int32

title

required

Short summary of the problem type. For about:blank, the status phrase.

string

type

Problem type URI, which resolves to its documentation. Absent means about:blank.

string

Example^generated

{
  "detail": "example",
  "errors": [
    {
      "detail": "example",
      "pointer": "example"
    }
  ],
  "status": 1,
  "title": "example",
  "type": "example"
}

503

The service is at capacity

Media typeapplication/problem+json

RFC 9457 problem details payload.

object

detail

Explanation specific to this occurrence, written to help correct the request.

string

errors

The invalid members of the request. Present on a validation problem.

Array<object>

One invalid member of a request, located by a JSON Pointer (RFC 6901).

object

detail

required

What is wrong with it.

string

pointer

required

JSON Pointer to the member within the request body. Empty for the whole body.

string

status

required

HTTP status code.

integer format: int32

title

required

Short summary of the problem type. For about:blank, the status phrase.

string

type

Problem type URI, which resolves to its documentation. Absent means about:blank.

string

Example^generated

{
  "detail": "example",
  "errors": [
    {
      "detail": "example",
      "pointer": "example"
    }
  ],
  "status": 1,
  "title": "example",
  "type": "example"
}