Alt Bank

alt.bank (Alt Bank) is a Brazilian fintech providing a fully integrated, turnkey credit-card and consumer-credit platform for partners who want to launch prepaid and postpaid cards without becoming a financial institution. Its flagship product, GUARD, is a machine-learning underwriting / credit-risk engine ("Brazil's most accurate credit model") that returns a Guard Score, risk band and credit-limit decision through a real-time partner API. The platform also bundles white-label credit cards (novücard), Visa BIN sponsorship, KYC, anti-fraud, dispute management and Pix/boleto payment processing. Partners integrate over a documented HTTPS API secured with a per-partner X-Partner-Auth token plus IP allow-listing, with a mirrored staging sandbox and asynchronous callback delivery of underwriting results. Backed by Anthemis, Union Square Ventures, Repeat Ventures and SquareOne Capital, alt.bank targets financial inclusion for underbanked consumers.

Alt Bank publishes 1 API on the APIs.io network: Underwriting API. Tagged areas include Company, Fintech, Banking, Credit, and Underwriting.

The Alt Bank catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Alt Bank’s developer surface includes documentation, getting-started guide, API reference, support, authentication, sandbox, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub

25.3/100 emerging ▬ flat Agent 21/100 agent aware Full breakdown ↓
scored 2026-08-30 · rubric v0.17.2

AccessSelf serve

1 APIs 1 MCP Servers

Company Fintech Banking Credit Underwriting Credit Cards Payments KYC Risk Brazil Financial Inclusion Banking as a Service

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Credit & Lending Management

BC-1320

Underwriting

POST /api/partner/credit/cards/underwritings

Kin Score

Kin Score How this is scored →
scored 2026-08-30 · rubric v0.17.2

Composite quality — 25.3/100 · emerging

Contract Quality 13.6 / 21

Developer Ergonomics 3.1 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.9 / 11

Contract Governance 0.0 / 10

Discoverability 5.7 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 0 / 7

Typed Event Surface 6 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Payments 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.

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/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/alt-bank: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 4

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

MCP Servers 1

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

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

LLMsTxt

WellKnown

AgentSkill

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Webhooks

Webhooks

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 2

The organization behind the API

Website

Website

LinkedIn

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: alt-bank
name: Alt Bank
description: alt.bank (Alt Bank) is a Brazilian fintech providing a fully integrated, turnkey credit-card and consumer-credit
  platform for partners who want to launch prepaid and postpaid cards without becoming a financial institution. Its flagship
  product, GUARD, is a machine-learning underwriting / credit-risk engine ("Brazil's most accurate credit model") that returns
  a Guard Score, risk band and credit-limit decision through a real-time partner API. The platform also bundles white-label
  credit cards (novücard), Visa BIN sponsorship, KYC, anti-fraud, dispute management and Pix/boleto payment processing. Partners
  integrate over a documented HTTPS API secured with a per-partner X-Partner-Auth token plus IP allow-listing, with a mirrored
  staging sandbox and asynchronous callback delivery of underwriting results. Backed by Anthemis, Union Square Ventures, Repeat
  Ventures and SquareOne Capital, alt.bank targets financial inclusion for underbanked consumers.
url: https://raw.githubusercontent.com/api-evangelist/alt-bank/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- anthemis
x-tier: profiled
x-tier-reason: enriched-from-developer-portal
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: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-08'
image: https://altbank.ai/wp-content/uploads/2020/08/cropped-alt.bank-logo-square-300x300.png
tags:
- Company
- Fintech
- Banking
- Credit
- Underwriting
- Credit Cards
- Payments
- KYC
- Risk
- Brazil
- Financial Inclusion
- Banking as a Service
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: GUARD API
  description: 'Real-time consumer credit underwriting / risk-assessment API. Partners POST an underwriting request for a
    credit-card applicant and receive a Guard Score, risk band and credit-limit decision. The call is asynchronous: the result
    is delivered to a partner-registered callback URL once the analysis is finished. Authenticated with a 64-character per-partner
    X-Partner-Auth token and IP allow-listing.'
  humanURL: https://developers.altbank.ai/docs/guard
  baseURL: https://guard.altbank.ai
  tags:
  - Credit
  - Underwriting
  - Risk
  - Credit Cards
  properties:
  - type: APIReference
    url: https://developers.altbank.ai/docs/guard
  - type: Sandbox
    url: https://guard.stg.altbank.ai
- name: CC Integration API
  description: Credit-card module integration API (private, partner B2B) for issuing and managing alt.bank white-label credit
    cards.
  humanURL: https://developers.altbank.ai/docs/cc-integration
  tags:
  - Credit Cards
  - Issuing
  properties:
  - type: APIReference
    url: https://developers.altbank.ai/docs/cc-integration
- name: SDK KYC API
  description: Identity verification / KYC SDK and API for onboarding and verifying applicants as part of the alt.bank credit
    and card flows.
  humanURL: https://developers.altbank.ai/docs/sdk-kyc
  tags:
  - KYC
  - Identity
  - Onboarding
  properties:
  - type: APIReference
    url: https://developers.altbank.ai/docs/sdk-kyc
- aid: alt-bank:alt-bank-underwriting-api
  name: Alt Bank Underwriting API
  description: Credit underwriting and risk scoring for partner card issuance.
  humanURL: https://developers.altbank.ai/docs/guard
  baseURL: https://guard.altbank.ai
  tags:
  - Underwriting
  properties:
  - type: OpenAPI
    url: openapi/alt-bank-underwriting-api-openapi.yml
common:
- type: CapabilityMap
  url: capabilities/alt-bank-capability-edges.yml
  name: Alt Bank Business Capability Map
- type: DomainSecurity
  url: security/alt-bank-domain-security.yml
- type: Website
  url: https://altbank.ai/en/
- type: DeveloperPortal
  url: https://developers.altbank.ai
- type: Documentation
  url: https://developers.altbank.ai/docs/guard-api
- type: GettingStarted
  url: https://developers.altbank.ai/docs/getting-started
- type: APIReference
  url: https://developers.altbank.ai/docs/guard
- type: Support
  url: https://altbank.ai/en/contact-us/
- type: LinkedIn
  url: https://www.linkedin.com/company/alt-bank
- type: Authentication
  url: authentication/alt-bank-authentication.yml
- type: Conventions
  url: conventions/alt-bank-conventions.yml
- type: Sandbox
  url: sandbox/alt-bank-sandbox.yml
- type: Webhooks
  url: asyncapi/alt-bank-guard-webhooks.yml
- type: MCPServer
  url: mcp/alt-bank-mcp.yml
- type: LLMsTxt
  url: llms/alt-bank-llms.txt
- type: WellKnown
  url: well-known/alt-bank-well-known.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence
x-merged-from:
- altbank

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Alt Bank

What this lets a business do 1

Kin Score

APIs 4

GUARD API

CC Integration API

SDK KYC API

Alt Bank Underwriting API

Open Collections 2

API Collection

alt.bank GUARD Underwriting API

MCP Servers 1

Alt Bank MCP Server

Event Specifications 1

Alt Bank Guard Webhooks

Security Posture 2

Alt Bank Authentication

Alt Bank Domain Security

Resources