Get a revision

cURL

curl --request GET \
  --url https://api.nohead.io/v1/records/{record_id}/revisions/{revision} \
  --header 'Authorization: Bearer <token>'

{
  "id": "rev_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
  "object": "record_revision",
  "record_id": "<string>",
  "revision": 123,
  "operation": "create",
  "actor": {
    "type": "user",
    "id": "<string>",
    "name": "<string>"
  },
  "via": "ui",
  "note": "<string>",
  "schema_version": 123,
  "reverted_to_revision": 123,
  "changed_fields": [
    "<string>"
  ],
  "redacted_fields": [
    "<string>"
  ],
  "draft": {
    "id": "<string>",
    "created_at": "2026-09-27T12:00:00.000Z",
    "created_by": {
      "type": "user",
      "id": "<string>",
      "name": "<string>"
    },
    "edited_by": [
      {
        "type": "user",
        "id": "<string>",
        "name": "<string>"
      }
    ]
  },
  "created_at": "2026-09-27T12:00:00.000Z",
  "published_at": "2023-11-07T05:31:56Z",
  "data": {
    "title": "Introducing Foo",
    "body": {
      "type": "doc",
      "content": []
    }
  },
  "changes": [
    {
      "kind": "added",
      "field": "<string>",
      "field_id": "<string>",
      "field_deleted": true,
      "attribute": "published_at",
      "before": "<unknown>",
      "after": "<unknown>"
    }
  ]
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

GET

records

{record_id}

revisions

{revision}

cURL

curl --request GET \
  --url https://api.nohead.io/v1/records/{record_id}/revisions/{revision} \
  --header 'Authorization: Bearer <token>'

{
  "id": "rev_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
  "object": "record_revision",
  "record_id": "<string>",
  "revision": 123,
  "operation": "create",
  "actor": {
    "type": "user",
    "id": "<string>",
    "name": "<string>"
  },
  "via": "ui",
  "note": "<string>",
  "schema_version": 123,
  "reverted_to_revision": 123,
  "changed_fields": [
    "<string>"
  ],
  "redacted_fields": [
    "<string>"
  ],
  "draft": {
    "id": "<string>",
    "created_at": "2026-09-27T12:00:00.000Z",
    "created_by": {
      "type": "user",
      "id": "<string>",
      "name": "<string>"
    },
    "edited_by": [
      {
        "type": "user",
        "id": "<string>",
        "name": "<string>"
      }
    ]
  },
  "created_at": "2026-09-27T12:00:00.000Z",
  "published_at": "2023-11-07T05:31:56Z",
  "data": {
    "title": "Introducing Foo",
    "body": {
      "type": "doc",
      "content": []
    }
  },
  "changes": [
    {
      "kind": "added",
      "field": "<string>",
      "field_id": "<string>",
      "field_deleted": true,
      "attribute": "published_at",
      "before": "<unknown>",
      "after": "<unknown>"
    }
  ]
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

{
  "error": {
    "type": "invalid_request",
    "message": "<string>",
    "request_id": "req_01J9ZQ3F8X5W2K7M4N6P0R1S2T",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "field": "<string>",
        "usage": 123,
        "limit": 123,
        "current_revision": 123,
        "record_id": "<string>",
        "draft_id": "<string>"
      }
    ]
  }
}

Authorizations

Authorization

string

header

required

Project-scoped API key, e.g. nohead_sk_k7fz0a9c3m2q_<secret>, or nohead_pk_… for a published-only key. Used by servers, CI, the CLI and coding agents.

Path Parameters

record_id

string

required

revision

integer

required

Per-record revision number.

Required range: x >= 1

Response

The revision with its snapshot and changes.

string

required

Example:

"rev_01J9ZQ3F8X5W2K7M4N6P0R1S2T"

object

any

required

record_id

string

required

revision

integer

required

operation

enum<string>

required

What made the revision; merge is a draft's changes.

Available options:

create,

update,

publish,

unpublish,

delete,

restore,

revert,

migrate,

merge

actor

object

required

Show child attributes

via

enum<string>

required

The client a change came through; scheduler for scheduled changes.

Available options:

ui,

api,

cli,

sdk,

mcp,

system,

scheduler

note

string | null

required

schema_version

integer

required

reverted_to_revision

integer | null

required

changed_fields

string[]

required

Keys of changed fields, and changed attributes.

redacted_fields

string[]

required

Keys of fields whose values in this revision were redacted (owners and admins redact them in the web app); those values read {"$redacted": true}.

draft

object | null

required

For a merge, the draft it merged, with who started and edited it; null otherwise.

Show child attributes

created_at

string<date-time>

required

ISO 8601 timestamp in UTC.

Example:

"2026-09-27T12:00:00.000Z"

published_at

string<date-time> | null

required

data

object

required

Field values keyed by field key.

A rich text value is written as Markdown (GitHub Flavored, a string) or as a ProseMirror JSON document ({"type": "doc", "content": [...]}), and stored and read as the document (rich_text reads it as HTML or Markdown). Markdown is converted as closely as the vocabulary allows: headings below h3 become h3, task list items plain items, footnotes and raw HTML text. A document uses the web editor's vocabulary (Tiptap's StarterKit and tables) and nothing else; another name is refused with invalid_format, naming ours where one fits (strong is bold):

blocks: paragraph, heading (level 1-3), blockquote, bulletList and orderedList (start, type) of listItem (starting with a paragraph), codeBlock (language), horizontalRule, and table of tableRow of tableHeader or tableCell (colspan, rowspan, colwidth, align); any block may have dir (auto, ltr, rtl);
inline: text (non-empty) and hardBreak;
marks on text: bold, italic, strike, underline, code (alone), and link (href, and target, rel, class, title); a link's href is an http, https, mailto, tel or relative URL.

An image of an asset is {"type": "image", "attrs": {"asset_id": "ast_...", "alt": "..."}} (in Markdown ![alt](ast_...), or the asset's image_url), between the document's blocks (not inside a list, quote or table), at most 100 per document (too_many_images); a newly shown image must be an uploaded JPEG, PNG, GIF, WebP, AVIF or SVG of the project (invalid_reference, type_not_accepted). expand embeds the assets, and published-only keys can read the images of published records. A record holds at most 2,000,000 bytes of values, all fields together (too_large on data); one already larger can still be edited without growing.

Example:

{
  "title": "Introducing Foo",
  "body": { "type": "doc", "content": [] }
}

changes

object[]

required

Show child attributes