API.market

API.market (Noveum) is an API marketplace launched in April 2024 where developers discover, subscribe to and call third-party APIs and AI models with one account, one x-api-market-key and unified billing, and where sellers import an OpenAPI source, set pricing plans and get paid. The platform itself exposes a hosted MCP gateway at https://api.market/api/mcp/gateway (Streamable HTTP, OAuth 2.1 with dynamic client registration, or API key) with five tools (search_apis, get_api_tools, call_api, check_usage, manage_subscription), a Subscription Management REST API and a read-only Usage API. Individual APIs sold on the marketplace belong to their own providers and are not listed here.

API.market is listed with 3 APIs on the APIs.io network. Tagged areas include API Marketplace, MCP, AI Agents, API Monetization, and Subscription.

API.market’s developer surface includes pricing, changelog, authentication, documentation, getting-started guide, engineering blog, support, and 30 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.0/100 developing ▼ -8.6 Agent 26/100 agent aware Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

3 APIs 1 MCP Servers

API Marketplace MCP AI Agents API Monetization Subscription Usage Metering Authentication

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 43.0/100 · developing

Contract Quality 0.3 / 19

Developer Ergonomics 7.1 / 15

Access Clarity 9.9 / 15

Operational Transparency 5.6 / 10

Contract Governance 1.6 / 9

Discoverability 6.0 / 8

Regulatory Posture 5.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 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 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

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/.

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/api-market: 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 3

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

API.market MCP Gateway

Hosted remote MCP server (Streamable HTTP) that lets AI agents discover and call the APIs listed on API.market through five tools: search_apis, get_api_tools, call_api, check_us...

API.market Subscription Management API

REST API for reading a marketplace product and its pricing plans, reading the caller's current subscription, creating/upgrading/downgrading a subscription to a pricing plan (wit...

API.market Usage API

Read-only REST API that returns quota, calls made and renewal dates for one subscription or for all of the caller's active subscriptions. Authenticated with the x-api-market-key...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

API.market MCP Gateway

Remote MCP server at api.market over streamable HTTP requiring OAuth; 5 tools listed.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Api Market Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Api Market Rate Limits

2 limits

RATE LIMITS

Security Posture 2

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

Api Market Authentication

2 schemes

SECURITY

Api Market Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Api Market Scopes

2 scopes

SCOPES

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Login

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

MCPServer

WellKnown

LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

Lifecycle

ErrorCatalog

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

GitHubRepository

GitHubRepository

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 5

Status, limits, changes, and where to get help

RateLimits

ChangeLog

StatusPage

Support

HelpCenter

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

Plans

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Website

Website

Blog

Blog

About

About

LinkedIn

Other 4

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Enterprise

Enterprise

Source (apis.yml)

name: API.market
aid: api-market
description: API.market (Noveum) is an API marketplace launched in April 2024 where developers discover, subscribe to and
  call third-party APIs and AI models with one account, one x-api-market-key and unified billing, and where sellers import
  an OpenAPI source, set pricing plans and get paid. The platform itself exposes a hosted MCP gateway at https://api.market/api/mcp/gateway
  (Streamable HTTP, OAuth 2.1 with dynamic client registration, or API key) with five tools (search_apis, get_api_tools, call_api,
  check_usage, manage_subscription), a Subscription Management REST API and a read-only Usage API. Individual APIs sold on
  the marketplace belong to their own providers and are not listed here.
url: https://raw.githubusercontent.com/api-evangelist/api-market/refs/heads/main/apis.yml
x-type: company
x-source: apis-io-submission
x-submitted-by: Shashank (founder), shashank@noveum.ai, email to kin@apievangelist.com 2026-09-25
x-attribution-note: 'Profile the MARKETPLACE ITSELF: its platform, MCP gateway, docs and portal. Do NOT list or register the
  individual third-party APIs sold through API.market as API.market APIs; they belong to their providers (Kin, 2026-09-25:
  marketplaces yes, their individual APIs no; confirmed by the founder the same day).'
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-25 (local-v5; was email submission worked by the support sweep 2026-09-25; root 200,
  invented path 404, llms.txt 200, /mcp 200, docs.api.market 200)
specificationVersion: '0.23'
created: '2026-09-25'
modified: '2026-09-27'
x-docs-platform: gitbook
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-09-25
tags:
- API Marketplace
- MCP
- AI Agents
- API Monetization
- Subscription
- Usage Metering
- Authentication
tags_raw:
- API Marketplace
- MCP
- Model Context Protocol
- AI Agents
- API Monetization
- Subscriptions
- Usage Metering
- OAuth
image: https://api.market/favicon.ico
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
common:
- type: Pricing
  url: https://api.market/seller
- type: RateLimits
  url: rate-limits/api-market-rate-limits.yml
- type: Plans
  url: plans/api-market-plans-pricing.yml
- type: ChangeLog
  url: changelog/api-market-changelog.yml
- type: Conventions
  url: conventions/api-market-conventions.yml
- type: Authentication
  url: authentication/api-market-authentication.yml
- type: OAuthScopes
  url: scopes/api-market-scopes.yml
- type: StatusPage
  url: https://status.api.market/status/dash
- type: Lifecycle
  url: lifecycle/api-market-lifecycle.yml
- type: ErrorCatalog
  url: errors/api-market-error-codes.yml
- type: Conformance
  url: conformance/api-market-conformance.yml
- type: LLMsTxt
  url: llms/api-market-llms.txt
- type: MCPServer
  url: mcp/api-market-mcp.yml
- type: WellKnown
  url: well-known/api-market-well-known.yml
- type: Hosts
  url: hosts/api-market-hosts.yml
- type: Vendors
  url: vendors/api-market-vendors.yml
- type: SDKs
  url: packages/api-market-packages.yml
- type: Packages
  url: packages/api-market-packages.yml
- type: DomainSecurity
  url: security/api-market-domain-security.yml
- type: Website
  url: https://api.market/
- type: Documentation
  url: https://docs.api.market/
- type: GettingStarted
  url: https://docs.api.market/getting-started
- type: GitHubOrganization
  url: https://github.com/Noveum
- type: GitHubRepository
  url: https://github.com/Noveum/api-market-agent-integrations
- type: Blog
  url: https://api.market/blog
- type: Support
  url: https://api.market/contact
- type: HelpCenter
  url: https://api.market/faq
- type: Login
  url: https://api.market/auth/login
- type: About
  url: https://api.market/about
- type: Enterprise
  url: https://api.market/enterprise
- type: TermsOfService
  url: https://api.market/terms_of_service
- type: PrivacyPolicy
  url: https://api.market/privacy_policy
- type: LinkedIn
  url: https://www.linkedin.com/company/api.market
- type: X
  url: https://x.com/apimarket_
- type: YouTube
  url: https://www.youtube.com/@api.market
- type: LLMsTxt
  url: llms/api-market-docs-llms.txt
- type: GettingStarted
  url: https://api.market/mcp
apis:
- aid: api-market:api-market-mcp-gateway
  name: API.market MCP Gateway
  description: 'Hosted remote MCP server (Streamable HTTP) that lets AI agents discover and call the APIs listed on API.market
    through five tools: search_apis, get_api_tools, call_api, check_usage and manage_subscription. Authenticates with OAuth
    2.1 (authorization code + PKCE S256, dynamic client registration, scope mcp:use) or an x-api-market-key header.'
  humanURL: https://api.market/mcp
  baseURL: https://api.market/api/mcp/gateway
  tags:
  - MCP
  - AI Agents
  - Authentication
  - API Marketplace
  tags_raw:
  - MCP
  - AI Agents
  - OAuth
  - API Marketplace
  properties:
  - type: Documentation
    url: https://docs.api.market/api.market-mcp-server-guide
  - type: GitHubRepository
    url: https://github.com/Noveum/api-market-agent-integrations
  - type: MCPServer
    url: mcp/api-market-mcp.yml
- aid: api-market:api-market-subscription-management-api
  name: API.market Subscription Management API
  description: REST API for reading a marketplace product and its pricing plans, reading the caller's current subscription,
    creating/upgrading/downgrading a subscription to a pricing plan (with a dry-run option) and cancelling a subscription.
    Authenticated with the x-api-market-key header.
  humanURL: https://docs.api.market/subscription-management-api-documentation
  baseURL: https://api.market
  tags:
  - Subscription
  - Billing
  - API Marketplace
  tags_raw:
  - Subscriptions
  - Billing
  - API Marketplace
  properties:
  - type: Documentation
    url: https://docs.api.market/subscription-management-api-documentation
- aid: api-market:api-market-usage-api
  name: API.market Usage API
  description: Read-only REST API that returns quota, calls made and renewal dates for one subscription or for all of the
    caller's active subscriptions. Authenticated with the x-api-market-key header.
  humanURL: https://docs.api.market/api.market-usage-api-documentation
  baseURL: https://prod.api.market
  tags:
  - Usage Metering
  - Analytics
  - API Marketplace
  properties:
  - type: Documentation
    url: https://docs.api.market/api.market-usage-api-documentation
x-coverage:
  state: covered
  reason: covered
  detail: Documented platform surfaces (hosted OAuth MCP gateway, GitBook docs MCP server, Subscription Management and Usage
    REST APIs) were profiled from the provider docs and live probes; no machine-readable REST contract is published.
  evidence:
  - url: https://api.market/.well-known/oauth-protected-resource/api/mcp/gateway
    status: 200
  - url: https://docs.api.market/~gitbook/mcp
    status: 200
  - url: https://docs.api.market/openapi.json
    status: 404
  checked: '2026-09-25'
x-enrichment:
  date: '2026-09-25'
  status: enriched
  artifacts_added: 20
  pass: local-v5

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