BRL

Crown (brl.xyz) is a Brazilian fintech, backed by Paradigm, Coinbase Ventures and Paxos, that issues BRLV — a stablecoin pegged 1:1 to the Brazilian Real and backed by Brazilian federal government bonds held in a bankruptcy-remote structure under temporary authorization from the Banco Central do Brasil. The Crown API lets partners create known-taxpayer accounts and sub-accounts, provision wallets, fund balances via PIX and TED, request quotes and place conversion orders across fiat (BRL/USD) and tokens (BRLV, wBRLY, USDC, USDT on Base and Ethereum mainnet), move tokens on-chain, claim accumulated yield from reward certificates (including recurring auto-claims and NFT reward-certificate transfers), withdraw via PIX/TED or token, track Brazilian monthly tax-exemption progress, and subscribe to webhooks for deposit, order, transfer, withdrawal, claim and sub-account approval events. Authentication pairs an X-API-Key identifier with a short-lived (<50s) self-signed RS256 JWT that binds each request's URI, nonce and SHA-256 body hash.

BRL publishes 11 APIs on the APIs.io network, including Accounts API, Assets API, Claims API, and 8 more. Tagged areas include Company, Crypto, Stablecoins, Payments, and Brazil.

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

BRL’s developer surface includes authentication, documentation, API reference, getting-started guide, signup flow, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

37.7/100 thin ▬ flat Agent 31/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company Crypto Stablecoins Payments Brazil Pix Fintech Blockchain Digital Assets Wallets Yield

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 37.7/100 · thin

Contract Quality 10.8 / 19

Developer Ergonomics 7.5 / 15

Access Clarity 3.6 / 15

Operational Transparency 0.8 / 10

Contract Governance 0.4 / 9

Discoverability 5.7 / 8

Regulatory Posture 4.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 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

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.

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/brl: 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 11

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

BRL Accounts API

The Accounts API from BRL — 27 operation(s) for accounts.

BRL Assets API

The Assets API from BRL — 4 operation(s) for assets.

BRL Claims API

The Claims API from BRL — 2 operation(s) for claims.

BRL Nft Transfers API

The Nft Transfers API from BRL — 1 operation(s) for nft transfers.

BRL Orders API

The Orders API from BRL — 2 operation(s) for orders.

BRL Quotes API

The Quotes API from BRL — 1 operation(s) for quotes.

BRL Tax Exemption API

The Tax Exemption API from BRL — 1 operation(s) for tax exemption.

BRL Transfers API

The Transfers API from BRL — 1 operation(s) for transfers.

BRL Wallets API

The Wallets API from BRL — 4 operation(s) for wallets.

BRL Withdrawals API

The Withdrawals API from BRL — 2 operation(s) for withdrawals.

BRL Crown API & Webhooks API

The Crown API & Webhooks API from BRL — 0 operation(s) for crown api & webhooks.

Scroll for all 11

Open Collections 11

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Crown API & Webhooks Accounts API

OPEN COLLECTION

Crown API & Webhooks Accounts Assets API

OPEN COLLECTION

Crown API & Webhooks Accounts Claims API

OPEN COLLECTION

Crown API & Webhooks Accounts Nft Transfers API

OPEN COLLECTION

Crown API & Webhooks Accounts Orders API

OPEN COLLECTION

Crown API & Webhooks Accounts Quotes API

OPEN COLLECTION

Crown API & Webhooks Accounts Tax Exemption API

OPEN COLLECTION

Crown API & Webhooks Accounts Transfers API

OPEN COLLECTION

Crown API & Webhooks Accounts Wallets API

OPEN COLLECTION

Crown API & Webhooks Accounts Withdrawals API

OPEN COLLECTION

Scroll for all 11

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Brl Webhooks

ASYNCAPI

Security Posture 2

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

Brl Authentication

apiKey/http · 3 schemes

SECURITY

Brl Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Brl Agentic Access

65 operations · 27 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

AgenticAccess

AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Webhooks

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

LinkedIn

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: brl
name: BRL
description: Crown (brl.xyz) is a Brazilian fintech, backed by Paradigm, Coinbase Ventures and Paxos, that issues BRLV — a
  stablecoin pegged 1:1 to the Brazilian Real and backed by Brazilian federal government bonds held in a bankruptcy-remote
  structure under temporary authorization from the Banco Central do Brasil. The Crown API lets partners create known-taxpayer
  accounts and sub-accounts, provision wallets, fund balances via PIX and TED, request quotes and place conversion orders
  across fiat (BRL/USD) and tokens (BRLV, wBRLY, USDC, USDT on Base and Ethereum mainnet), move tokens on-chain, claim accumulated
  yield from reward certificates (including recurring auto-claims and NFT reward-certificate transfers), withdraw via PIX/TED
  or token, track Brazilian monthly tax-exemption progress, and subscribe to webhooks for deposit, order, transfer, withdrawal,
  claim and sub-account approval events. Authentication pairs an X-API-Key identifier with a short-lived (<50s) self-signed
  RS256 JWT that binds each request's URI, nonce and SHA-256 body hash.
url: https://raw.githubusercontent.com/api-evangelist/brl/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- paradigm
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - url: https://brl.xyz
    status: 301
    note: declared website redirects to https://www.crown-brlv.com/ — a different registrable domain (brl.xyz -> crown-brlv.com),
      possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Crypto
- Stablecoins
- Payments
- Brazil
- Pix
- Fintech
- Blockchain
- Digital Assets
- Wallets
- Yield
tags_raw:
- Company
- Crypto
- Stablecoin
- Payments
- Brazil
- PIX
- Fintech
- Blockchain
- Digital Assets
- Wallets
- Yield
image: https://raw.githubusercontent.com/api-evangelist/brl/refs/heads/main/apis.yml
apis:
- aid: brl:brl-accounts-api
  name: BRL Accounts API
  description: The Accounts API from BRL — 27 operation(s) for accounts.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Account
  tags_raw:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/brl-accounts-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-assets-api
  name: BRL Assets API
  description: The Assets API from BRL — 4 operation(s) for assets.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Assets
  properties:
  - type: OpenAPI
    url: openapi/brl-assets-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-claims-api
  name: BRL Claims API
  description: The Claims API from BRL — 2 operation(s) for claims.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Claims
  properties:
  - type: OpenAPI
    url: openapi/brl-claims-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-nft-transfers-api
  name: BRL Nft Transfers API
  description: The Nft Transfers API from BRL — 1 operation(s) for nft transfers.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Nft Transfers
  properties:
  - type: OpenAPI
    url: openapi/brl-nft-transfers-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-orders-api
  name: BRL Orders API
  description: The Orders API from BRL — 2 operation(s) for orders.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Order
  tags_raw:
  - Orders
  properties:
  - type: OpenAPI
    url: openapi/brl-orders-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-quotes-api
  name: BRL Quotes API
  description: The Quotes API from BRL — 1 operation(s) for quotes.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Quotes
  properties:
  - type: OpenAPI
    url: openapi/brl-quotes-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-tax-exemption-api
  name: BRL Tax Exemption API
  description: The Tax Exemption API from BRL — 1 operation(s) for tax exemption.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Tax Exemption
  properties:
  - type: OpenAPI
    url: openapi/brl-tax-exemption-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-transfers-api
  name: BRL Transfers API
  description: The Transfers API from BRL — 1 operation(s) for transfers.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Transfers
  properties:
  - type: OpenAPI
    url: openapi/brl-transfers-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-wallets-api
  name: BRL Wallets API
  description: The Wallets API from BRL — 4 operation(s) for wallets.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Wallets
  properties:
  - type: OpenAPI
    url: openapi/brl-wallets-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-withdrawals-api
  name: BRL Withdrawals API
  description: The Withdrawals API from BRL — 2 operation(s) for withdrawals.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Withdrawals
  properties:
  - type: OpenAPI
    url: openapi/brl-withdrawals-api-openapi.yml
  - type: Documentation
    url: https://docs.crown-brlv.com/
  - type: APIReference
    url: https://docs.crown-brlv.com/api-reference/introduction
  - type: GettingStarted
    url: https://docs.crown-brlv.com/guides/api-keys-setup
  - type: Authentication
    url: https://docs.crown-brlv.com/guides/authentication
  - type: Webhooks
    url: https://docs.crown-brlv.com/guides/webhooks-setup
- aid: brl:brl-crown-api-webhooks-api
  name: BRL Crown API & Webhooks API
  description: The Crown API & Webhooks API from BRL — 0 operation(s) for crown api & webhooks.
  humanURL: https://docs.crown-brlv.com/
  baseURL: https://app.crown-brlv.com
  tags:
  - Crown API & Webhooks
  properties:
  - type: OpenAPI
    url: openapi/brl-crown-api-webhooks-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/brl-domain-security.yml
- type: Authentication
  url: authentication/brl-authentication.yml
- type: Website
  url: https://brl.xyz
- type: DeveloperPortal
  url: https://docs.crown-brlv.com/
- type: Documentation
  url: https://docs.crown-brlv.com/
- type: APIReference
  url: https://docs.crown-brlv.com/api-reference/introduction
- type: GettingStarted
  url: https://docs.crown-brlv.com/guides/api-keys-setup
- type: SignUp
  url: https://onboarding.crown-brlv.com/start
- type: Login
  url: https://app.crown-brlv.com/
- type: PrivacyPolicy
  url: https://d2bv8dtly8iz1m.cloudfront.net/crown/Crown_PT_Termo_de_Privacidade_27a36188f2.pdf
- type: LinkedIn
  url: https://www.linkedin.com/company/crown-brl/
- type: OpenAPI
  url: openapi/_original/brl-openapi-original.json
- type: LLMsTxt
  url: llms/brl-llms.txt
- type: Webhooks
  url: asyncapi/brl-webhooks.yml
- type: Conventions
  url: conventions/brl-conventions.yml
- type: ErrorCatalog
  url: errors/brl-problem-types.yml
- type: Lifecycle
  url: lifecycle/brl-lifecycle.yml
- type: Conformance
  url: conformance/brl-conformance.yml
- type: DataModel
  url: data-model/brl-data-model.yml
- type: X-MCPServerCandidate
  url: mcp/brl-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Overlay
  url: overlays/brl-openapi-overlay.yaml
- type: AgenticAccess
  url: agentic-access/brl-agentic-access.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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