CometAPI website screenshot

CometAPI

CometAPI is an AI API aggregator that consolidates access to 500+ models from multiple providers (OpenAI, Anthropic, Google, xAI, DeepSeek, Alibaba, and more) behind a single OpenAI-compatible REST surface. It supports chat completions, embeddings, image generation, text-to-video and image-to-video, speech synthesis, and audio transcription. CometAPI positions itself as a drop-in replacement for the OpenAI SDK (changing only the base URL and key), with pay-as-you-go pricing reportedly 20-40% cheaper than direct vendor rates, sub-400ms median latency, and 99.9% service availability.

CometAPI publishes 6 APIs on the APIs.io network, including Audio API, Chat API, Embeddings API, and 3 more. Tagged areas include Artificial Intelligence, Aggregator, Audio, Chat, and Embeddings.

The CometAPI catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

CometAPI’s developer surface includes authentication, documentation, getting-started guide, engineering blog, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub
34.0/100 thin ▬ flat Agent 20/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessFreemiumSelf serve⚡ Free to try
1 APIs
Artificial IntelligenceAggregatorAudioChatEmbeddingsGenerative AIImageLLMMulti-ModelOpenAI-CompatibleVideo

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 34.0/100 · thin
Contract Quality 13.1 / 23
Developer Ergonomics 4.3 / 18
Access Clarity 4.3 / 18
Operational Transparency 1.2 / 12
Contract Governance 1.5 / 11
Discoverability 6.8 / 9
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 20/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 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
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.
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 github.com/api-evangelist/cometapi: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 6

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

CometAPI Audio API

Speech synthesis, transcription, and translation.

CometAPI Chat API

Chat completions across LLM providers.

CometAPI Embeddings API

Vector embeddings for retrieval and similarity.

CometAPI Images API

Text-to-image and image-to-image generation.

CometAPI Models API

List of supported models routable by CometAPI.

CometAPI Video API

Text-to-video, image-to-video, and video extension.

Open Collections 8

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

API Collection

OPEN COLLECTION

CometAPI Unified Audio API

OPEN COLLECTION

CometAPI Unified Audio Chat API

OPEN COLLECTION

CometAPI Unified Audio Embeddings API

OPEN COLLECTION

CometAPI Unified Audio Images API

OPEN COLLECTION

CometAPI Unified Audio Models API

OPEN COLLECTION

CometAPI Unified API

OPEN COLLECTION

CometAPI Unified Audio Video API

OPEN COLLECTION

Scroll for all 8

Pricing Plans 1

Published pricing tiers and plan structures.

Cometapi Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Cometapi Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Cometapi Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Cometapi Context

0 classes · 4 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

CometAPI API Rules

5 rules · 4 warnings 1 info

SPECTRAL

CometAPI API Rules

9 rules · 4 errors 3 warnings 2 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

CometAPI Chat Completion Response

6 properties

JSON SCHEMA

Security Posture 3

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

Cometapi Authentication

http · 1 scheme

SECURITY

Cometapi Domain Security

TLSv1.3 · DMARC

SECURITY

Cometapi Trust Center

trust center published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Cometapi Agentic Access

7 operations · 6 acting

7 operations · 6 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 JSONSchema
JSONSchema

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLD
JSONLD
 Spectral
Spectral

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

HelpCenter
HelpCenter

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: cometapi
url: https://raw.githubusercontent.com/api-evangelist/cometapi/refs/heads/main/apis.yml
name: CometAPI
tags:
- Artificial Intelligence
- Aggregator
- Audio
- Chat
- Embeddings
- Generative AI
- Image
- LLM
- Multi-Model
- OpenAI-Compatible
- Video
tags_raw:
- AI
- Aggregator
- Audio
- Chat
- Embeddings
- Generative AI
- Images
- LLM
- Multi-Model
- OpenAI-Compatible
- Video
type: Index
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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/cometapi.png
access: 3rd-Party
kind: company
created: '2026-03-16'
modified: '2026-05-19'
position: Consuming
description: CometAPI is an AI API aggregator that consolidates access to 500+ models from multiple providers (OpenAI, Anthropic,
  Google, xAI, DeepSeek, Alibaba, and more) behind a single OpenAI-compatible REST surface. It supports chat completions,
  embeddings, image generation, text-to-video and image-to-video, speech synthesis, and audio transcription. CometAPI positions
  itself as a drop-in replacement for the OpenAI SDK (changing only the base URL and key), with pay-as-you-go pricing reportedly
  20-40% cheaper than direct vendor rates, sub-400ms median latency, and 99.9% service availability.
apis:
- aid: cometapi:cometapi-audio-api
  name: CometAPI Audio API
  description: Speech synthesis, transcription, and translation.
  humanURL: https://apidoc.cometapi.com/
  baseURL: https://api.cometapi.com/v1
  tags:
  - Audio
  properties:
  - type: OpenAPI
    url: openapi/cometapi-audio-api-openapi.yml
  - type: Documentation
    url: https://apidoc.cometapi.com/
  - type: Marketing
    url: https://www.cometapi.com/
- aid: cometapi:cometapi-chat-api
  name: CometAPI Chat API
  description: Chat completions across LLM providers.
  humanURL: https://apidoc.cometapi.com/
  baseURL: https://api.cometapi.com/v1
  tags:
  - Chat
  properties:
  - type: OpenAPI
    url: openapi/cometapi-chat-api-openapi.yml
  - type: Documentation
    url: https://apidoc.cometapi.com/
  - type: Marketing
    url: https://www.cometapi.com/
- aid: cometapi:cometapi-embeddings-api
  name: CometAPI Embeddings API
  description: Vector embeddings for retrieval and similarity.
  humanURL: https://apidoc.cometapi.com/
  baseURL: https://api.cometapi.com/v1
  tags:
  - Embeddings
  properties:
  - type: OpenAPI
    url: openapi/cometapi-embeddings-api-openapi.yml
  - type: Documentation
    url: https://apidoc.cometapi.com/
  - type: Marketing
    url: https://www.cometapi.com/
- aid: cometapi:cometapi-images-api
  name: CometAPI Images API
  description: Text-to-image and image-to-image generation.
  humanURL: https://apidoc.cometapi.com/
  baseURL: https://api.cometapi.com/v1
  tags:
  - Image
  tags_raw:
  - Images
  properties:
  - type: OpenAPI
    url: openapi/cometapi-images-api-openapi.yml
  - type: Documentation
    url: https://apidoc.cometapi.com/
  - type: Marketing
    url: https://www.cometapi.com/
- aid: cometapi:cometapi-models-api
  name: CometAPI Models API
  description: List of supported models routable by CometAPI.
  humanURL: https://apidoc.cometapi.com/
  baseURL: https://api.cometapi.com/v1
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/cometapi-models-api-openapi.yml
  - type: Documentation
    url: https://apidoc.cometapi.com/
  - type: Marketing
    url: https://www.cometapi.com/
- aid: cometapi:cometapi-video-api
  name: CometAPI Video API
  description: Text-to-video, image-to-video, and video extension.
  humanURL: https://apidoc.cometapi.com/
  baseURL: https://api.cometapi.com/v1
  tags:
  - Video
  properties:
  - type: OpenAPI
    url: openapi/cometapi-video-api-openapi.yml
  - type: Documentation
    url: https://apidoc.cometapi.com/
  - type: Marketing
    url: https://www.cometapi.com/
common:
- type: AgenticAccess
  url: agentic-access/cometapi-agentic-access.yml
- type: TrustCenter
  url: security/cometapi-trust-center.yml
- type: DomainSecurity
  url: security/cometapi-domain-security.yml
- type: Authentication
  url: authentication/cometapi-authentication.yml
- type: GitHubOrganization
  url: https://github.com/CometAPI-dev
- type: LinkedIn
  url: https://www.linkedin.com/company/cometapi
- type: Website
  url: https://www.cometapi.com/
- type: Documentation
  url: https://apidoc.cometapi.com/
- type: HelpCenter
  url: https://apidoc.cometapi.com/help-center
- type: GettingStarted
  url: https://apidoc.cometapi.com/how-to-use-cometapi-1792005m0
- url: json-ld/cometapi-context.jsonld
  type: JSONLD
- url: json-schema/cometapi-chat-completion-schema.json
  type: JSONSchema
- url: rules/cometapi-rules.yml
  type: Spectral
- type: LlmsText
  url: https://www.cometapi.com/llms.txt
- url: https://www.cometapi.com/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.23'

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