Sylvia API

Sylvia API is a third-party Reddit data API that serves Reddit content as JSON — posts, comments with full recursive threads, subreddit and user surfaces, and a live comment feed. Twelve read operations cover post and comment search, single-item lookup, subreddit and user timelines, a live comments stream, dataset torrents for bulk access, and a usage endpoint. Authentication is an API key. It occupies the gap left by Pushshift, giving researchers and developers queryable Reddit history without going through OAuth on the first-party API.

Sylvia API publishes 7 APIs on the APIs.io network, including Comments API, Datasets API, Live API, and 4 more. Tagged areas include Reddit, Social, Data, Search, and Comments.

Sylvia API’s developer surface includes authentication and 2 more developer resources.

🌐 Visit website 📡 Source on GitHub
25.6/100 emerging ▬ flat Agent 25/100 agent aware Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0
7 APIs
RedditSocialDataSearchCommentsResearchContentDatasets

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0
Composite quality — 25.6/100 · emerging
Contract Quality 15.3 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 8.2 / 10
Agent readiness — 25/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/sylvia-api: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

Sylvia API Comments API

The Comments API from Sylvia API — 2 operation(s) for comments.

Sylvia API Datasets API

The Datasets API from Sylvia API — 1 operation(s) for datasets.

Sylvia API Live API

The Live API from Sylvia API — 1 operation(s) for live.

Sylvia API Posts API

The Posts API from Sylvia API — 2 operation(s) for posts.

Sylvia API Subreddits API

The Subreddits API from Sylvia API — 2 operation(s) for subreddits.

Sylvia API Usage API

The Usage API from Sylvia API — 1 operation(s) for usage.

Sylvia API Users API

The Users API from Sylvia API — 3 operation(s) for users.

Scroll for all 7

Open Collections 8

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Sylvia Comments API

OPEN COLLECTION

Sylvia Datasets API

OPEN COLLECTION

Sylvia Live API

OPEN COLLECTION

Sylvia Posts API

OPEN COLLECTION

Sylvia Subreddits API

OPEN COLLECTION

Sylvia Usage API

OPEN COLLECTION

Sylvia Users API

OPEN COLLECTION

Scroll for all 8

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Sylvia Api Authentication

1 scheme

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText
LlmsText

Access & Security 1

Authentication, authorization, and security posture

Authentication
Authentication

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: sylvia-api
url: https://raw.githubusercontent.com/api-evangelist/sylvia-api/refs/heads/main/apis.yml
name: Sylvia API
description: Sylvia API is a third-party Reddit data API that serves Reddit content as JSON — posts, comments with full recursive
  threads, subreddit and user surfaces, and a live comment feed. Twelve read operations cover post and comment search, single-item
  lookup, subreddit and user timelines, a live comments stream, dataset torrents for bulk access, and a usage endpoint. Authentication
  is an API key. It occupies the gap left by Pushshift, giving researchers and developers queryable Reddit history without
  going through OAuth on the first-party API.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sylvia-api.png
created: '2026-08-04'
modified: '2026-08-04'
specificationVersion: '0.21'
type: Index
position: Producing
access: 3rd-Party
kind: contract
tags:
- Reddit
- Social
- Data
- Search
- Comments
- Research
- Content
- Datasets
apis:
- aid: sylvia-api:sylvia-api-comments-api
  name: Sylvia API Comments API
  description: The Comments API from Sylvia API — 2 operation(s) for comments.
  humanURL: https://sylvia-api.com/
  baseURL: https://api.sylvia-api.com/v1
  tags:
  - Comments
  properties:
  - type: OpenAPI
    url: openapi/sylvia-api-comments-api-openapi.yml
  - type: X-OpenAPI-Source
    url: https://sylvia-api.com/openapi.json
  - type: Website
    url: https://sylvia-api.com/
  - type: Authentication
    url: authentication/sylvia-api-authentication.yml
  - type: LlmsText
    url: https://sylvia-api.com/llms.txt
- aid: sylvia-api:sylvia-api-datasets-api
  name: Sylvia API Datasets API
  description: The Datasets API from Sylvia API — 1 operation(s) for datasets.
  humanURL: https://sylvia-api.com/
  baseURL: https://api.sylvia-api.com/v1
  tags:
  - Datasets
  properties:
  - type: OpenAPI
    url: openapi/sylvia-api-datasets-api-openapi.yml
  - type: X-OpenAPI-Source
    url: https://sylvia-api.com/openapi.json
  - type: Website
    url: https://sylvia-api.com/
  - type: Authentication
    url: authentication/sylvia-api-authentication.yml
  - type: LlmsText
    url: https://sylvia-api.com/llms.txt
- aid: sylvia-api:sylvia-api-live-api
  name: Sylvia API Live API
  description: The Live API from Sylvia API — 1 operation(s) for live.
  humanURL: https://sylvia-api.com/
  baseURL: https://api.sylvia-api.com/v1
  tags:
  - Live
  properties:
  - type: OpenAPI
    url: openapi/sylvia-api-live-api-openapi.yml
  - type: X-OpenAPI-Source
    url: https://sylvia-api.com/openapi.json
  - type: Website
    url: https://sylvia-api.com/
  - type: Authentication
    url: authentication/sylvia-api-authentication.yml
  - type: LlmsText
    url: https://sylvia-api.com/llms.txt
- aid: sylvia-api:sylvia-api-posts-api
  name: Sylvia API Posts API
  description: The Posts API from Sylvia API — 2 operation(s) for posts.
  humanURL: https://sylvia-api.com/
  baseURL: https://api.sylvia-api.com/v1
  tags:
  - Posts
  properties:
  - type: OpenAPI
    url: openapi/sylvia-api-posts-api-openapi.yml
  - type: X-OpenAPI-Source
    url: https://sylvia-api.com/openapi.json
  - type: Website
    url: https://sylvia-api.com/
  - type: Authentication
    url: authentication/sylvia-api-authentication.yml
  - type: LlmsText
    url: https://sylvia-api.com/llms.txt
- aid: sylvia-api:sylvia-api-subreddits-api
  name: Sylvia API Subreddits API
  description: The Subreddits API from Sylvia API — 2 operation(s) for subreddits.
  humanURL: https://sylvia-api.com/
  baseURL: https://api.sylvia-api.com/v1
  tags:
  - Subreddits
  properties:
  - type: OpenAPI
    url: openapi/sylvia-api-subreddits-api-openapi.yml
  - type: X-OpenAPI-Source
    url: https://sylvia-api.com/openapi.json
  - type: Website
    url: https://sylvia-api.com/
  - type: Authentication
    url: authentication/sylvia-api-authentication.yml
  - type: LlmsText
    url: https://sylvia-api.com/llms.txt
- aid: sylvia-api:sylvia-api-usage-api
  name: Sylvia API Usage API
  description: The Usage API from Sylvia API — 1 operation(s) for usage.
  humanURL: https://sylvia-api.com/
  baseURL: https://api.sylvia-api.com/v1
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/sylvia-api-usage-api-openapi.yml
  - type: X-OpenAPI-Source
    url: https://sylvia-api.com/openapi.json
  - type: Website
    url: https://sylvia-api.com/
  - type: Authentication
    url: authentication/sylvia-api-authentication.yml
  - type: LlmsText
    url: https://sylvia-api.com/llms.txt
- aid: sylvia-api:sylvia-api-users-api
  name: Sylvia API Users API
  description: The Users API from Sylvia API — 3 operation(s) for users.
  humanURL: https://sylvia-api.com/
  baseURL: https://api.sylvia-api.com/v1
  tags:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/sylvia-api-users-api-openapi.yml
  - type: X-OpenAPI-Source
    url: https://sylvia-api.com/openapi.json
  - type: Website
    url: https://sylvia-api.com/
  - type: Authentication
    url: authentication/sylvia-api-authentication.yml
  - type: LlmsText
    url: https://sylvia-api.com/llms.txt
common:
- url: https://sylvia-api.com/
  type: Website
- url: https://sylvia-api.com/llms.txt
  type: LlmsText
- url: authentication/sylvia-api-authentication.yml
  type: Authentication
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
X-Discovery:
  date: '2026-08-04'
  method: probed
  note: Submitted through the Add-API pipeline and PARKED as low_confidence. Reviewed by hand and approved — the pipeline
    was misled by a site-wide HTML catch-all.
  findings:
  - surface: OpenAPI
    url: https://sylvia-api.com/openapi.json
    http_status: 200
    real: true
    note: OpenAPI 3.0.3, 12 paths, 12 operations, 8 schemas, ApiKeyAuth, server api.sylvia-api.com/v1. All 12 operations carry
      an operationId.
  - surface: LlmsTxt
    url: https://sylvia-api.com/llms.txt
    http_status: 200
    real: true
    note: 3,558 bytes, distinct from the catch-all body.
  - surface: Control
    url: https://sylvia-api.com/zzz-control
    http_status: 200
    real: false
    note: CATCH-ALL CONFIRMED — /, /apis.json, /docs and this control path all return the same 3,122 bytes (md5 65bd0d3b).
      That is why the submission scored low confidence. The OpenAPI and llms.txt above return DIFFERENT bytes and different
      checksums, which is what distinguishes a real artifact from the catch-all.