EdgeChat Timeline API
The Timeline API from EdgeChat — 1 operation(s) for timeline.
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OpenAPI Specification
openapi: 3.2.0
info:
title: Edgepedia Timeline API
version: '1'
description: Read-only JSON access to the Edgepedia encyclopedia articles. Keyless. 600 requests a minute and 100,000 a day per IP address (429 with Retry-After past that). Free with credit under the Edgepedia Community License 1.0; AI training is open to everyone.
license:
name: Edgepedia Community License 1.0
url: https://www.edgechat.ai/edgepedia/license
contact:
url: https://www.edgechat.ai/developers
name: EdgeChat
email: olivia.jin@biostate.ai
x-logo:
url: https://www.edgechat.ai/assets/edgechat-chestnut-orange-logo-v2.png
altText: EdgeChat
backgroundColor: '#FFFFFF'
href: https://www.edgechat.ai/developers
x-origin:
- format: openapi
version: '3.1'
url: https://www.edgechat.ai/openapi.json
servers:
- url: https://www.edgechat.ai/api/v1
tags:
- name: Timeline
paths:
/timeline:
get:
operationId: getTimeline
summary: Dated events of a topic or place
description: Oldest first, 50 a page. A node's index keeps at most 200 events spread over its dates; from and to filter that sample, and `sampled` says when it is one.
parameters:
- name: topic
in: query
required: false
description: ''
schema:
type: string
example: life.animals.mammals.monotremes-marsupials
- name: geo
in: query
required: false
description: ''
schema:
type: string
- name: from
in: query
required: false
description: ''
schema:
type: integer
- name: to
in: query
required: false
description: ''
schema:
type: integer
- name: page
in: query
required: false
description: Page, from 1.
schema:
type: integer
minimum: 1
- name: format
in: query
required: false
description: json (default) or mermaid.
schema:
type: string
enum:
- json
- mermaid
- $ref: '#/components/parameters/fields'
responses:
'200':
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/GetTimelineResponse'
examples:
live:
summary: GET https://www.edgechat.ai/api/v1/timeline?topic=life.animals.mammals.monotremes-marsupials
description: 'A live answer of 2026-10-07: arrays cut to two items, long text cut with an ellipsis.'
value:
node:
id: life.animals.mammals.monotremes-marsupials
label: Monotremes and marsupials
tree: topics
total: 97
page: 1
pages: 2
results:
- date: '-1000'
text: Indigenous Australian rock art depicting thylacine-like animals occurs across northern Australia, including the Kimberley region and the Dampier Rock Art Precinct, with some engravings dating back to at least 1000 BC.
id: epegk4s3ak
slug: thylacine
title: Thylacine
url: https://www.edgechat.ai/thylacine
- date: '1658'
text: The word "quokka" derives from a Noongar word; Noongar people today also use the names ban-gup, bungeup, and quak–a. In 1658 the Dutch mariner Samuel Volckertzoon described seeing "a wild cat" on the island, and in 1696 the Dutch explorer Willem de Vlamingh mistook quokkas for gi…
id: epqxng0qsy
slug: quokka
title: Quokka
url: https://www.edgechat.ai/quokka
license:
name: Edgepedia Community License 1.0
url: https://www.edgechat.ai/edgepedia/license
summary: Free with credit, commercial use included. AI training is open to everyone. For other uses, organizations over USD 100M in revenue or 100M monthly users license separately.
text/plain:
schema:
type: string
description: 'format=mermaid: a Mermaid diagram as text.'
headers:
RateLimit-Policy:
$ref: '#/components/headers/RateLimit-Policy'
ETag:
$ref: '#/components/headers/ETag'
Last-Modified:
$ref: '#/components/headers/Last-Modified'
Content-Digest:
$ref: '#/components/headers/Content-Digest'
Edgepedia-Corpus-Version:
$ref: '#/components/headers/Edgepedia-Corpus-Version'
'400':
$ref: '#/components/responses/Error'
'404':
$ref: '#/components/responses/Error'
'503':
$ref: '#/components/responses/Error'
tags:
- Timeline
components:
headers:
RateLimit-Policy:
description: 'The limiter''s two windows, per IP address and per server instance (IETF RateLimit header fields): 600 requests a minute and 100,000 a day.'
schema:
type: string
example: '"minute";q=600;w=60, "day";q=100000;w=86400'
Content-Digest:
description: sha-256 of the body (RFC 9530).
schema:
type: string
Edgepedia-Corpus-Version:
description: The corpus release that answered.
schema:
type: string
Last-Modified:
description: The corpus release date (informational; only the ETag validates).
schema:
type: string
ETag:
description: A hash of the body; send it back as If-None-Match for a 304.
schema:
type: string
responses:
Error:
description: 'An error: { error: { code, message } }'
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
schemas:
GetTimelineResponse:
type: object
properties:
node:
type: object
properties:
id:
type: string
label:
type: string
tree:
type: string
total:
type: integer
description: The events in the index for this answer. An index holds at most 200; when it is full the answer is a sample and says `sampled`.
page:
type: integer
pages:
type: integer
results:
type: array
items:
type: object
properties:
date:
type: string
text:
type: string
id:
type: string
slug:
type: string
title:
type: string
url:
type: string
license:
type: object
properties:
name:
type: string
url:
type: string
summary:
type: string
sampled:
type: boolean
description: 'true when the index holds its cap (200): `total` counts the sample, not every dated sentence; from and to filter the sample.'
cap:
type: integer
description: 'Shape read from a live answer of 2026-10-07; fields may be added, never renamed or removed. Every field is optional: an answer carries the fields of its own branch.'
Error:
type: object
properties:
error:
type: object
properties:
code:
type: string
message:
type: string
hint:
type: string
next:
type: string
format: uri
did_you_mean:
type: array
items:
type: object
properties:
id:
type: string
slug:
type: string
title:
type: string
api_url:
type: string
required:
- code
- message
required:
- error
parameters:
fields:
name: fields
in: query
required: false
description: 'Comma-separated keys: each result (or the answer, when it has no results) keeps only these.'
schema:
type: string