World Labs

World Labs is a company surfaced as a portfolio company of sv-angel and added to the API Evangelist network as a stub for enrichment. Sector: ai. This profile is a lead awaiting the enrichment pipeline.

World Labs publishes 2 API contracts indexed on the APIs.io network: Credits API and Marble API. Tagged areas include Company and Artificial Intelligence.

The World Labs catalog on APIs.io includes 1 Spectral governance ruleset.

World Labs’ developer surface includes engineering blog, authentication, and 6 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

24.1/100 emerging ▬ flat Agent 29/100 agent aware Front door AI 3/6 light Heartbeat 83/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 Agent Skills

Company Artificial Intelligence

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 24.1/100 · emerging

Contract Quality 9.2 / 19

Developer Ergonomics 3.1 / 15

Access Clarity 0.0 / 15

Operational Transparency 1.0 / 10

Contract Governance 1.6 / 9

Discoverability 3.5 / 8

Regulatory Posture 2.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 29/100 · 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 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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
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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 20.7 — up to +15.9 composite points
Contract Quality scores 49.1 — up to +12.7 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/world-labs/apis.yml: open an issue on github.com/api-evangelist/world-labs 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 →

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 2

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

World Labs Credits API

The credits API from World Labs — 1 operation(s) for credits.

World Labs Marble API

The Marble API from World Labs — 8 operation(s) for marble.

Open Collections 2

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

Marble Public API v1 credits API

OPEN COLLECTION

Public API v1 credits Marble API

OPEN COLLECTION

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

marble-developer-api

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

World Labs API Rules

56 rules · 46 errors 7 warnings 3 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

World Labs Marble Overlay

4 actions · update · world-labs-marble-openapi-original.yml

DERIVED

Security Posture 3

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

World Labs Authentication

apiKey · 1 scheme

SECURITY

World Labs Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

World Labs Vulnerability Disclosure

no policy recorded

SECURITY

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

X-MCPServerCandidate

X-MCPServerCandidate

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: world-labs
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/world-labs.png
name: World Labs
description: 'World Labs is a company surfaced as a portfolio company of sv-angel and added to the API Evangelist network
  as a stub for enrichment. Sector: ai. This profile is a lead awaiting the enrichment pipeline.'
url: https://raw.githubusercontent.com/api-evangelist/world-labs/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- sv-angel
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Artificial Intelligence
tags_raw:
- Company
- Ai
apis:
- aid: world-labs:world-labs-credits-api
  name: World Labs Credits API
  description: The credits API from World Labs — 1 operation(s) for credits.
  tags:
  - Credit
  tags_raw:
  - credits
  properties:
  - type: OpenAPI
    url: openapi/world-labs-credits-api-openapi.yml
- aid: world-labs:world-labs-marble-api
  name: World Labs Marble API
  description: The Marble API from World Labs — 8 operation(s) for marble.
  tags:
  - Marble
  properties:
  - type: OpenAPI
    url: openapi/world-labs-marble-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://www.worldlabs.ai/blog
  type: Blog
- type: AgentSkill
  url: skills/world-labs-marble-developer-api.md
- type: X-MCPServerCandidate
  url: mcp/world-labs-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Overlay
  url: overlays/world-labs-marble-overlay.yaml
- type: VulnerabilityDisclosure
  url: security/world-labs-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/world-labs-domain-security.yml
- type: Authentication
  url: authentication/world-labs-authentication.yml
- type: Website
  url: https://worldlabs.ai

World Labs API — frequently asked questions

Does World Labs have an API?

Yes. APIs.io lists 2 APIs from World Labs, including World Labs Credits API and World Labs Marble API.

Is there an OpenAPI specification for the World Labs API?

Yes. APIs.io indexes 2 OpenAPI specifications for World Labs, each linked for download from this page.

How do I authenticate with the World Labs API?

World Labs uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as World Labs Authentication.

Is the World Labs API ready for AI agents?

World Labs has a Kin Score of 24.1 out of 100 (emerging) and an Agent Readiness score of 28.5 (agent-aware), scored by API Evangelist on 2026-11-06.

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