OCLC

The Discovery API allows you to surface both WorldCat and WorldCat Discovery central index data in search results, including: Materials held by your library and ...

OCLC publishes 1 API on the APIs.io network. Tagged areas include Library, WorldCat, Discovery, and Bibliographic.

OCLC’s developer surface includes engineering blog and 2 more developer resources.

🌐 Visit website 📡 Source on GitHub

16.5/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemium

1 APIs

LibraryWorldCatDiscoveryBibliographic

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 16.5/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 0.4 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.1 / 13

Governance 0.0 / 12

Discoverability 4.1 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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/oclc: 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 1

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

OCLC

The Discovery API allows you to surface both WorldCat and WorldCat Discovery central index data in search results, including: Materials held by your library and ...

Pricing Plans 1

Published pricing tiers and plan structures.

Oclc Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Oclc Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Oclc Finops

FINOPS

Security Posture 1

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

Oclc Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 2

The organization behind the API

LinkedIn

Blog

Blog

Source (apis.yml)

aid: oclc
name: OCLC
description: 'The Discovery API allows you to surface both WorldCat and WorldCat Discovery central index data in search results,
  including: Materials held by your library and ...'
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/oclc.png
tags:
- Library
- WorldCat
- Discovery
- Bibliographic
created: '2025-01-08'
modified: '2026-04-28'
url: https://raw.githubusercontent.com/api-evangelist/oclc/refs/heads/main/apis.yml
specificationVersion: '0.19'
common:
- type: DomainSecurity
  url: security/oclc-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/oclc
- type: Blog
  url: https://www.oclc.org/en/news.html
apis:
- aid: oclc:oclc
  name: OCLC
  description: 'The Discovery API allows you to surface both WorldCat and WorldCat Discovery central index data in search
    results, including: Materials held by your library and ...'
  humanURL: https://www.oclc.org/developer/api/oclc-apis/worldcat-discovery-api.en.html
  tags:
  - Library
  - WorldCat
  - Discovery
  properties:
  - type: Documentation
    url: https://www.oclc.org/developer/api/oclc-apis/worldcat-discovery-api.en.html
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com