21.co

21.co is a company identified in the API Evangelist harvest backlog (source: g2-catalog). Public information about its services, API offerings, or operational details is currently limited. Attempts to access its claimed website https://21.co were unsuccessful, indicating the domain may be inactive, parked, or otherwise unreachable, and no official documentation or API endpoints could be located at this time.

21.co is profiled on the APIs.io network. Tagged areas include Company, Fintech, Payments, Banking, and Platform.

📡 Profile data on GitHub

1.4/100 minimal Agent 3/100 human only Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

0 APIs

Company Fintech Payments Banking Platform

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 1.4/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 3.8 / 9

Regulatory Posture 0.0 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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 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

Regulatory Posture applies to this provider. Its tags matched the Banking & Open Finance 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/21/"><img src="https://apis.io/badge/21/card.svg" alt="21.co on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

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/21: 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 →

Resources

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: '21'
name: '21.co '
description: '21.co is a company identified in the API Evangelist harvest backlog (source: g2-catalog). Public information
  about its services, API offerings, or operational details is currently limited. Attempts to access its claimed website https://21.co
  were unsuccessful, indicating the domain may be inactive, parked, or otherwise unreachable, and no official documentation
  or API endpoints could be located at this time.'
url: https://raw.githubusercontent.com/api-evangelist/21/refs/heads/main/apis.yml
x-type: company
x-source: harvest:g2-catalog
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-19 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-19'
modified: '2026-10-19'
tags:
- Company
- Fintech
- Payments
- Banking
- Platform
tags_raw:
- Company
- FinTech
- Payments
- Banking
- API
- Platform
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Hosts
  url: hosts/21-hosts.yml
apis: []
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Unable to retrieve any OpenAPI, AsyncAPI, GraphQL, or other machine-readable contract from api.21.co endpoints.
  evidence:
  - url: https://api.21.co/openapi.json
    status: 0
  checked: '2026-10-19'
x-enrichment:
  date: '2026-10-19'
  status: minimal
  artifacts_added: 5
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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