Mozilla accounts

Mozilla Accounts (formerly Firefox Accounts) is Mozilla’s unified authentication and user profile service that powers Firefox Sync, Pocket, and other Mozilla products. It provides secure sign‑in, account recovery, and profile management via a set of public APIs. The service is open‑source, with its code hosted on GitHub, and its documentation is available in the repository and on Mozilla’s developer site.

Mozilla accounts is listed with 1 API on the APIs.io network. Tagged areas include Company, Authentication, Identity, Mozilla, and OpenSource.

Mozilla accounts’ developer surface includes documentation, getting-started guide, support, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

18.8/100 emerging Agent 9/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Company Authentication IdentityMozillaOpenSource

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 18.8/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 0.0 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.9 / 10

Discoverability 5.3 / 9

Regulatory Posture 4.1 / 15

Agent readiness — 9/100 · agent aware

Machine-Readable Contract 0 / 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 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 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

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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 35.7 — up to +12.9 composite points

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.

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/mozilla-accounts/apis.yml: open an issue on github.com/api-evangelist/mozilla-accounts 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 →

APIs 1

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

Firefox Accounts API

API for Mozilla's unified authentication and user profile service.

Security Posture 3

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

Mozilla Accounts Authentication

2 schemes

SECURITY

Mozilla Accounts Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Mozilla Accounts Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Mozilla Accounts Scopes

16 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Access & Security 4

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: mozilla-accounts
name: Mozilla accounts
description: Mozilla Accounts (formerly Firefox Accounts) is Mozilla’s unified authentication and user profile service that
  powers Firefox Sync, Pocket, and other Mozilla products. It provides secure sign‑in, account recovery, and profile management
  via a set of public APIs. The service is open‑source, with its code hosted on GitHub, and its documentation is available
  in the repository and on Mozilla’s developer site.
url: https://raw.githubusercontent.com/api-evangelist/mozilla-accounts/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-27'
modified: '2026-10-27'
tags:
- Company
- Authentication
- Identity
- Mozilla
- OpenSource
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: SecurityTxt
  url: well-known/mozilla-accounts-www-security.txt
- type: Security
  url: https://www.mozilla.org/en-US/security/bug-bounty/
- type: WellKnown
  url: well-known/mozilla-accounts-well-known.yml
- type: Hosts
  url: hosts/mozilla-accounts-hosts.yml
- type: Vendors
  url: vendors/mozilla-accounts-vendors.yml
- type: VulnerabilityDisclosure
  url: security/mozilla-accounts-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/mozilla-accounts-domain-security.yml
- type: Website
  url: https://accounts.firefox.com/
- type: DeveloperPortal
  url: https://github.com/mozilla/fxa
- type: Documentation
  url: https://github.com/mozilla/fxa/tree/main/docs
- type: GettingStarted
  url: https://github.com/mozilla/fxa#readme
- type: Support
  url: https://support.mozilla.org/en-US/products/firefox/accounts
apis:
- name: Firefox Accounts API
  description: API for Mozilla's unified authentication and user profile service.
  humanURL: https://api.accounts.firefox.com/swagger.json
  baseURL: https://api.accounts.firefox.com/v1
  properties: []
  aid: mozilla-accounts:firefox-accounts-api
x-submission-probe: 200, 2026-10-26
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  method: derived
  generated: '2026-10-27'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company publishes developer documentation but serves no machine-readable contract from it
  evidence:
  - url: https://accounts.firefox.com/
    status: 200
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 10
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Mozilla accounts API — frequently asked questions

Does Mozilla accounts have an API?

Yes. APIs.io lists 1 API from Mozilla accounts, including Firefox Accounts API.

How do I authenticate with the Mozilla accounts API?

Mozilla accounts documents its authentication (2 schemes). The details are profiled on APIs.io as Mozilla Accounts Authentication.

Is the Mozilla accounts API ready for AI agents?

Mozilla accounts has a Kin Score of 18.8 out of 100 (emerging) and an Agent Readiness score of 9.4 (agent-aware), scored by API Evangelist on 2026-10-31.

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