Letterboxd

Letterboxd is a social film diary platform providing a REST API for accessing film metadata, user reviews, watchlists, ratings, member activity, log entries, lists, and film festival coverage. The API is available by request only and uses OAuth2 for authentication, supporting both public data access via Client Credentials and member-authenticated operations via Authorization Code flow. Developers can query films, members, log entries, lists, contributors, and search across the full Letterboxd catalog.

Letterboxd is listed with 1 API on the APIs.io network. Tagged areas include Film, Movies, Social, Reviews, and Watchlist.

Letterboxd’s developer surface includes engineering blog, GitHub presence, FAQ, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

25.6/100 emerging ▬ flat Agent 18/100 agent aware Heartbeat 82/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

1 API

Film Movies Social Reviews Watchlist Ratings DiaryFilm FestivalEntertainment

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 25.6/100 · emerging

Contract Quality 5.1 / 21

Developer Ergonomics 4.0 / 17

Access Clarity 6.2 / 17

Operational Transparency 1.0 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.1 / 15

Agent readiness — 18/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 24.0 — up to +19.0 composite points Ask about this →
Developer Ergonomics scores 23.8 — up to +15.2 composite points Ask about this →
Access Clarity scores 36.2 — up to +12.8 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/letterboxd/apis.yml: open an issue on github.com/api-evangelist/letterboxd to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Film & Media Identifiers (EIDR, ISAN, MovieLabs, DPP)	covered	12.1 (thin)	-	-
Raycast Store Extensions (first-party publishers + community-wrapped products)	covered	12.1 (thin)	-	-
Obsidian Community Plugins (third-party APIs the Obsidian plugin ecosystem integrates)	covered	12.1 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Letterboxd API

REST API providing access to Letterboxd film data, member profiles, watchlists, ratings, diary log entries, user-created lists, contributors, editorial stories, and cross-catalo...

Letterboxd API pricing

Not yet checked against Letterboxd's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure.

Plan	Price
Application Access	—

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Plans

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Rate Limits

1 limits

RATE LIMITS

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

Letterboxd

14 quoted statements, read from Letterboxd's own page on 2026-11-09.

TERMS

Privacy & Data 1

Its role, the data it processes, retention and transfers, quoted from its own privacy page.

Letterboxd

27 quoted statements, read from Letterboxd's own page on 2026-11-09.

PRIVACY

Eligibility 1

Who may sign up and where, quoted from its own terms.

Letterboxd

4 quoted statements, read from Letterboxd's own page on 2026-11-09.

ELIGIBILITY

AI Preferences 1

Its stance on AI training, inference and agents, quoted from its own pages.

Letterboxd

1 quoted statement, read from Letterboxd's own page on 2026-11-09.

AI PREFS

Data License 1

How its data and outputs may be reused, quoted from its own terms.

Letterboxd

2 quoted statements, read from Letterboxd's own page on 2026-11-09.

LICENSE

FinOps 1

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

Finops

FINOPS

Security Posture 1

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

Letterboxd Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

AIPreferences

AIPreferences

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

FAQ

FAQ

Contact

Contact

Commercial 6

Pricing, plans, and the legal terms of use

Plans

FinOps

TermsOfService

PrivacyPolicy

UsageTerms

DataLicense

Company 4

The organization behind the API

Blog

BlogRSS

Website

Blog

Other 2

Properties that don't map to a standard resource type

DataProcessing

DataProcessing

Eligibility

Eligibility

Source (apis.yml)

aid: letterboxd
name: Letterboxd
description: Letterboxd is a social film diary platform providing a REST API for accessing film metadata, user reviews, watchlists,
  ratings, member activity, log entries, lists, and film festival coverage. The API is available by request only and uses
  OAuth2 for authentication, supporting both public data access via Client Credentials and member-authenticated operations
  via Authorization Code flow. Developers can query films, members, log entries, lists, contributors, and search across the
  full Letterboxd catalog.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/letterboxd.png
url: https://raw.githubusercontent.com/api-evangelist/letterboxd/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-10-06'
specificationVersion: '0.23'
type: Index
tags:
- Film
- Movies
- Social
- Reviews
- Watchlist
- Ratings
- Diary
- Film Festival
- Entertainment
apis:
- name: Letterboxd API
  description: REST API providing access to Letterboxd film data, member profiles, watchlists, ratings, diary log entries,
    user-created lists, contributors, editorial stories, and cross-catalog search. The base URL is https://api.letterboxd.com/api/v0.
    Access is granted by application only; developers must email api@letterboxd.com with their use case. Authentication uses
    OAuth2 Client Credentials for public data and Authorization Code for member-specific operations.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://letterboxd.com/api-beta/
  baseURL: https://api.letterboxd.com/api/v0
  tags:
  - Film
  - Movies
  - Social
  - Reviews
  - Watchlist
  - Ratings
  - Log Entries
  - List
  - Members
  - Search
  tags_raw:
  - Film
  - Movies
  - Social
  - Reviews
  - Watchlist
  - Ratings
  - Log Entries
  - Lists
  - Members
  - Search
  properties:
  - type: Documentation
    url: https://api-docs.letterboxd.com/
  - type: OpenAPI
    url: https://api-docs.letterboxd.com/
  - type: Authentication
    url: https://letterboxd.com/api-beta/
  - type: TermsOfService
    url: https://letterboxd.com/legal/terms-of-use/
  - type: PrivacyPolicy
    url: https://letterboxd.com/legal/privacy-notice/
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/letterboxd/refs/heads/main/plans/plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/letterboxd/refs/heads/main/rate-limits/rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/letterboxd/refs/heads/main/finops/finops.yml
  contact:
  - FN: Letterboxd API Support
    email: api@letterboxd.com
common:
- type: Plans
  url: plans/plans.yml
- type: RateLimits
  url: rate-limits/rate-limits.yml
- type: FinOps
  url: finops/finops.yml
- url: https://letterboxd.com/journal/
  type: Blog
- url: https://letterboxd.com/journal/rss/
  type: BlogRSS
- type: Website
  url: https://letterboxd.com
- type: DomainSecurity
  url: security/letterboxd-domain-security.yml
- type: GitHub
  url: https://github.com/Letterboxd
- type: Blog
  url: https://news.letterboxd.com/
- type: TermsOfService
  url: https://letterboxd.com/legal/terms-of-use/
- type: PrivacyPolicy
  url: https://letterboxd.com/legal/privacy-notice/
- type: FAQ
  url: https://letterboxd.com/about/faq/
- type: Contact
  url: https://letterboxd.com/about/
- type: UsageTerms
  url: terms/letterboxd-terms-of-service.yml
- type: DataProcessing
  url: privacy/letterboxd-privacy-policy.yml
- type: Eligibility
  url: eligibility/letterboxd-eligibility.yml
- type: AIPreferences
  url: ai-preferences/letterboxd-ai-preferences.yml
- type: DataLicense
  url: data-license/letterboxd-data-license.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Letterboxd API — frequently asked questions

Does Letterboxd have an API?

Yes. APIs.io lists 1 API from Letterboxd, including Letterboxd API.

Is there an OpenAPI specification for the Letterboxd API?

Yes. APIs.io indexes 1 OpenAPI specification for Letterboxd, each linked for download from this page.

How do I authenticate with the Letterboxd API?

Letterboxd uses bearer-token authentication.

How much does the Letterboxd API cost?

APIs.io lists 1 pricing plan for Letterboxd, with each plan's price, limits and inclusions under Pricing on this page.

Is the Letterboxd API ready for AI agents?

Letterboxd has a Kin Score of 25.6 out of 100 (emerging) and an Agent Readiness score of 18.0 (agent-aware), scored by API Evangelist on 2026-11-13.

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