APIVerve

An agent-native API marketplace exposing 300+ (367+ enumerated) ready-made REST APIs behind a single API key with a uniform JSON envelope. Offers REST, an alpha GraphQL gateway, OpenAPI + Postman contracts, a self-hosted apis.json, an llms.txt, and a hosted remote MCP server that turns the whole catalog into agent tools.

APIVerve publishes 31 API contracts indexed on the APIs.io network, including AI/Computer Vision API, Astrology API, Calendar API, and 28 more. Tagged areas include API Marketplace, REST, JSON, GraphQL, and OpenAPI.

APIVerve’s developer surface includes authentication, documentation, API reference, getting-started guide, support, engineering blog, pricing, and 31 more developer resources.

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62.4/100 strong ▬ flat Agent 51/100 agent ready Front door AI 2/6 trace Heartbeat 46/100 slowing Full breakdown ↓
scored 2026-11-01 · rubric v0.26.0 · Show this score on your site →

1 published contract 1 MCP Servers 3 Agent Skills

API Marketplace REST JSON GraphQL OpenAPI Postman MCP llms-txt Agent-Native APIKeys IP Geolocation DNS WHOIS SSL Email Verification Phone Validation Exchange Ratesmetals pricesWeather Geocoding Text Processing Developer Tools

Kin Score

Kin Score How this is scored →
scored 2026-11-01 · rubric v0.26.0

Composite quality — 62.4/100 · strong

Contract Quality 9.9 / 19

Developer Ergonomics 12.8 / 15

Access Clarity 12.6 / 15

Operational Transparency 4.1 / 10

Contract Governance 0.4 / 9

Discoverability 5.6 / 8

Regulatory Posture 4.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 51/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 7 / 7

Rate-Limit Signaling 7 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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):

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
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
Dry-Run / Simulate Mode +4 pts — OpenAPI: destructive operations expose a dry_run / simulate / preview / validate_only parameter
Well-Known Catalog +4 pts — common[].type includes WellKnown, APICatalog, or api-catalog

1 more unmet check in the Agent Readiness table above.

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

Contract Quality scores 52.7 — up to +11.8 composite points
Contract Governance scores 4.5 — up to +11.5 composite points
Operational Transparency scores 42.1 — up to +7.5 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/apiverve/apis.yml: open an issue on github.com/api-evangelist/apiverve 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Weather and Climate Data	long-tail	9.0	1	-
GraphQL Ecosystem (Foundation, graphql.org listings, public GraphQL APIs)	long-tail	9.0	1	-
Official SDKs on Packagist, pub.dev and Hex	long-tail	9.0	1	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 9

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.

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