Composite

Composite (Composite Sciences, Inc.) is an AI‑powered browser autopilot that runs locally in Chrome, Edge, or Arc to automate repetitive web tasks. The platform lets users describe a task in natural language and watches it get done, offering a free beta with no setup required. It targets professionals seeking to streamline data entry, research, CRM updates, and other browser‑based workflows, providing a downloadable product at zero cost. Founded in 2024 and based in San Francisco, Composite integrates AI to predict user actions, extract information, and interact with web applications without requiring custom API integrations.

Composite is profiled on the APIs.io network. Tagged areas include AI, Automation, Browser, SaaS, and Productivity.

Composite’s developer surface includes engineering blog, support, pricing, signup flow, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

18.7/100 emerging Agent 7/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

0 APIs

AIAutomation BrowserSaaSProductivity Company

Kin Score

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

Composite quality — 18.7/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 10.3 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 2.6 / 15

Agent readiness — 7/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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 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 5 / 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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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

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
Developer Ergonomics scores 7.1 — up to +18.6 composite points
Operational Transparency scores 0.0 — up to +13.0 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/composite/apis.yml: open an issue on github.com/api-evangelist/composite 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 →

Security Posture 2

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

Composite Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Composite Trust Center

SOC 2

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Access & Security 3

Authentication, authorization, and security posture

Compliance

Compliance

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Pricing

Pricing

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: composite
name: Composite
description: Composite (Composite Sciences, Inc.) is an AI‑powered browser autopilot that runs locally in Chrome, Edge, or
  Arc to automate repetitive web tasks. The platform lets users describe a task in natural language and watches it get done,
  offering a free beta with no setup required. It targets professionals seeking to streamline data entry, research, CRM updates,
  and other browser‑based workflows, providing a downloadable product at zero cost. Founded in 2024 and based in San Francisco,
  Composite integrates AI to predict user actions, extract information, and interact with web applications without requiring
  custom API integrations.
url: https://artifacts.apis.io/composite/apis.yml
x-type: company
image: https://imagedelivery.net/ihXHxFMfVWH7HR2jdEkB_A/08358984-b75b-4af6-af40-fa319c9ce000/optimal
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-29 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-29'
modified: '2026-10-29'
tags:
- AI
- Automation
- Browser
- SaaS
- Productivity
- Company
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: WellKnown
  url: well-known/composite-well-known.yml
- type: Compliance
  url: https://trust.composite.com/
- type: Hosts
  url: hosts/composite-hosts.yml
- type: Vendors
  url: vendors/composite-vendors.yml
- type: TrustCenter
  url: security/composite-trust-center.yml
- type: DomainSecurity
  url: security/composite-domain-security.yml
- type: Website
  url: https://composite.com
- type: Blog
  url: https://composite.com/blog
- type: PrivacyPolicy
  url: https://composite.com/privacy
- type: TermsOfService
  url: https://composite.com/terms
- type: Support
  url: https://composite.com/contact
- type: Pricing
  url: https://composite.com/pricing
- type: SignUp
  url: https://composite.com
apis: []
x-backed-by:
- true-ventures
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: The provider's website renders only a JavaScript shell, preventing machine‑readable API documentation from being
    accessed.
  evidence:
  - url: https://composite.com
    status: 200
  checked: '2026-10-29'
x-enrichment:
  date: '2026-10-29'
  status: enriched
  artifacts_added: 9
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

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get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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