C6 Bank

C6 Bank is a Brazilian digital bank offering a full suite of financial products including checking accounts, credit cards, loans, investments, and international banking, all accessible via a mobile app. It emphasizes innovative features such as C6 Carbon, C6 Graphene, and AI-powered assistance, targeting both individuals and businesses with competitive rewards and low fees.

C6 Bank is profiled on the APIs.io network. Tagged areas include Company, Banking, Fintech, Digital Bank, and Brazil.

C6 Bank’s developer surface includes support, documentation, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

12.5/100 emerging ▲ 8.3 Agent 0/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs

Company Banking Fintech Digital Bank Brazil

Kin Score

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

Composite quality — 12.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 4.0 / 17

Access Clarity 1.3 / 17

Operational Transparency 2.3 / 11

Contract Governance 0.0 / 10

Discoverability 3.8 / 9

Regulatory Posture 2.0 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 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

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 7.9 — up to +18.4 composite points
Developer Ergonomics scores 23.8 — up to +15.2 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/c6-bank/apis.yml: open an issue on github.com/api-evangelist/c6-bank 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 →

Security Posture 2

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

C6 Bank Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

C6 Bank Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Access & Security 5

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

TrustCenter

TrustCenter

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: c6-bank
name: C6 Bank
description: C6 Bank is a Brazilian digital bank offering a full suite of financial products including checking accounts,
  credit cards, loans, investments, and international banking, all accessible via a mobile app. It emphasizes innovative features
  such as C6 Carbon, C6 Graphene, and AI-powered assistance, targeting both individuals and businesses with competitive rewards
  and low fees.
url: https://raw.githubusercontent.com/api-evangelist/c6-bank/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-06 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: none
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-10-06'
modified: '2026-10-06'
tags:
- Company
- Banking
- Fintech
- Digital Bank
- Brazil
tags_raw:
- Company
- Banking
- FinTech
- DigitalBank
- Brazil
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: SecurityTxt
  url: well-known/c6-bank-clarity-security.txt
- type: TrustCenter
  url: https://trust.com.br:443/
- type: Support
  url: https://support.com.br:443/
- type: StatusPage
  url: https://status.com.br:443/
- type: Documentation
  url: https://doc.com.br:443/
- type: DeveloperPortal
  url: https://developers.com.br:443/
- type: WellKnown
  url: well-known/c6-bank-well-known.yml
- type: Security
  url: https://clarity.com/vdp
- type: Hosts
  url: hosts/c6-bank-hosts.yml
- type: Vendors
  url: vendors/c6-bank-vendors.yml
- type: VulnerabilityDisclosure
  url: security/c6-bank-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/c6-bank-domain-security.yml
- type: Website
  url: https://www.c6bank.com.br:443/
apis: []
x-coverage:
  state: none
  reason: no-developer-program
  detail: No API documentation or OpenAPI spec found at known API hosts (api.com.br) and no developer portal is listed.
  evidence:
  - url: https://api.com.br/openapi.json
    status: 404
  checked: '2026-10-06'
x-enrichment:
  date: '2026-10-06'
  status: enriched
  artifacts_added: 6
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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