EdgeChat Surface API
The Surface API from EdgeChat — 1 operation(s) for surface.
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OpenAPI Specification
openapi: 3.2.0
info:
title: Edgepedia Surface 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: Surface
paths:
/surface:
get:
operationId: surface
summary: The articles the corpus's links meant by a phrase
parameters:
- name: form
in: query
required: true
description: The phrase
schema:
type: string
example: mercury
- name: limit
in: query
required: false
description: 1 to 50 (default 20)
schema:
type: integer
- $ref: '#/components/parameters/fields'
responses:
'200':
description: The phrase's targets
content:
application/json:
schema:
$ref: '#/components/schemas/SurfaceResponse'
examples:
live:
summary: GET https://www.edgechat.ai/api/v1/surface?form=mercury
description: 'A live answer of 2026-10-07: arrays cut to two items, long text cut with an ellipsis.'
value:
form: mercury
links: 0
total: 0
results: []
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.
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':
description: Bad request
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
headers:
RateLimit-Policy:
$ref: '#/components/headers/RateLimit-Policy'
'429':
description: Rate limited
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
headers:
RateLimit-Policy:
$ref: '#/components/headers/RateLimit-Policy'
RateLimit:
$ref: '#/components/headers/RateLimit'
Retry-After:
description: Seconds to wait before the next request.
schema:
type: integer
'503':
description: The derived data this route reads is not published yet
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
headers:
RateLimit-Policy:
$ref: '#/components/headers/RateLimit-Policy'
tags:
- Surface
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'
RateLimit:
description: 'On a 429 only: the window that was exceeded, no requests remaining (r=0), and the seconds until it resets (t).'
schema:
type: string
example: '"minute";r=0;t=42'
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
schemas:
SurfaceResponse:
type: object
properties:
form:
type: string
links:
type: integer
total:
type: integer
results:
type: array
items:
allOf:
- $ref: '#/components/schemas/ArticleRef'
- type: object
properties:
links:
type: integer
commonness:
type: number
license:
type: object
properties:
name:
type: string
url:
type: string
summary:
type: string
required:
- name
- url
- summary
ArticleRef:
type: object
properties:
id:
type: string
slug:
type: string
title:
type: string
url:
type: string
api_url:
type: string
importance:
type: number
rank:
type: integer
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