Angle website screenshot

Angle

Angle (Angle Labs, Inc.) is a decentralized, over-collateralized stablecoin protocol that issued the euro-pegged EURA and dollar-pegged USDA stablecoins, along with yield-bearing staked versions of each. Its on-chain modules included the Transmuter basket-and-dynamic-fee minting system, a borrowing module for depositing collateral against stablecoin debt, a native savings system, and cross-chain liquidity infrastructure. The protocol is open source under the AngleProtocol GitHub organization and ships a TypeScript SDK for building applications on top of it. Angle has announced the end of its operations — the protocol remains fully collateralized and every USDA and EURA is redeemable 1:1 until 1 March 2027 — and the team's ongoing work has moved to Merkl. Angle exposes smart contracts and a client SDK rather than a documented public REST API.

Angle publishes 20 APIs on the APIs.io network, including Allowances API, Angle Protocol Data API, App API, and 17 more. Tagged areas include Company, Stablecoins, Decentralized Finance, Blockchain, and Cryptocurrency.

Angle’s developer surface includes authentication, documentation, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub
29.7/100 thin ▬ flat Agent 42/100 agent ready Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0
AccessSelf serve
20 APIs 1 MCP Servers
CompanyStablecoinsDecentralized FinanceBlockchainCryptocurrencySmart ContractsEthereumSDK

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0
Composite quality — 29.7/100 · thin
Contract Quality 11.0 / 25
Developer Ergonomics 6.1 / 20
Access Clarity 0.0 / 20
Operational Transparency 1.4 / 13
Contract Governance 2.0 / 12
Discoverability 9.3 / 10
Agent readiness — 42/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 6 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 4 / 4
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/angle: 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 20

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

Angle Allowances API

The Allowances API from Angle — 1 operation(s) for allowances.

Angle Angle Protocol Data API

The Angle Protocol Data API from Angle — 3 operation(s) for angle protocol data.

Angle App API

The App API from Angle — 1 operation(s) for app.

Angle Apr API

The Apr API from Angle — 1 operation(s) for apr.

Angle Balances API

The Balances API from Angle — 1 operation(s) for balances.

Angle Borrow API

The Borrow API from Angle — 4 operation(s) for borrow.

Angle Bridge API

The Bridge API from Angle — 1 operation(s) for bridge.

Angle Dao API

The Dao API from Angle — 1 operation(s) for dao.

Angle Helpers API

The Helpers API from Angle — 5 operation(s) for helpers.

Angle Incentives API

The Incentives API from Angle — 1 operation(s) for incentives.

Angle Integrators API

The Integrators API from Angle — 6 operation(s) for integrators.

Angle Perpetuals API

The Perpetuals API from Angle — 1 operation(s) for perpetuals.

Angle Pools API

The Pools API from Angle — 1 operation(s) for pools.

Angle Prices API

The Prices API from Angle — 1 operation(s) for prices.

Angle Savings API

The Savings API from Angle — 3 operation(s) for savings.

Angle Tvl API

The Tvl API from Angle — 1 operation(s) for tvl.

Angle User related information API

The User related information API from Angle — 3 operation(s) for user related information.

Angle VaultManagers API

The VaultManagers API from Angle — 1 operation(s) for vaultmanagers.

Angle Vaults API

The Vaults API from Angle — 1 operation(s) for vaults.

Angle Volume API

The Volume API from Angle — 1 operation(s) for volume.

Scroll for all 20

Open Collections 21

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

API Collection

OPEN COLLECTION

Angle Allowances API

OPEN COLLECTION

Angle Allowances Angle Protocol Data API

OPEN COLLECTION

Angle Allowances App API

OPEN COLLECTION

Angle Allowances Apr API

OPEN COLLECTION

Angle Allowances Balances API

OPEN COLLECTION

Angle Allowances Borrow API

OPEN COLLECTION

Angle Allowances Bridge API

OPEN COLLECTION

Angle Allowances Dao API

OPEN COLLECTION

Angle Allowances Helpers API

OPEN COLLECTION

Angle Allowances Incentives API

OPEN COLLECTION

Angle Allowances Integrators API

OPEN COLLECTION

Angle Allowances Perpetuals API

OPEN COLLECTION

Angle Allowances Pools API

OPEN COLLECTION

Angle Allowances Prices API

OPEN COLLECTION

Angle Allowances Savings API

OPEN COLLECTION

Angle Allowances Tvl API

OPEN COLLECTION

Angle Allowances User related information API

OPEN COLLECTION

Angle Allowances VaultManagers API

OPEN COLLECTION

Angle Allowances Vaults API

OPEN COLLECTION

Angle Allowances Volume API

OPEN COLLECTION

Scroll for all 21

MCP Servers 1

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

Angle MCP Server

MCP SERVER

Security Posture 2

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

Angle Authentication

1 scheme

SECURITY

Angle Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Documentation 3

Reference material describing how the API behaves

ContributionGuide
ContributionGuide
 OpenAPI
OpenAPI
 Documentation
Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle
 Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 DataModel
DataModel
 Conformance
Conformance

Build 5

SDKs, sample code, and the tooling you integrate with

CodeOfConduct
CodeOfConduct
 GitHubOrganization
GitHubOrganization
 SourceCode
SourceCode
 Packages
Packages
 SDKs
SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

IssueTracker
IssueTracker
 Deprecation
Deprecation

Commercial 3

Pricing, plans, and the legal terms of use

License
License
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 1

The organization behind the API

Website
Website

Other 2

Properties that don't map to a standard resource type

Overlay
Overlay
 Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
aid: angle
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
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/angle.png
name: Angle
description: Angle (Angle Labs, Inc.) is a decentralized, over-collateralized stablecoin protocol that issued the euro-pegged
  EURA and dollar-pegged USDA stablecoins, along with yield-bearing staked versions of each. Its on-chain modules included
  the Transmuter basket-and-dynamic-fee minting system, a borrowing module for depositing collateral against stablecoin debt,
  a native savings system, and cross-chain liquidity infrastructure. The protocol is open source under the AngleProtocol GitHub
  organization and ships a TypeScript SDK for building applications on top of it. Angle has announced the end of its operations
  — the protocol remains fully collateralized and every USDA and EURA is redeemable 1:1 until 1 March 2027 — and the team's
  ongoing work has moved to Merkl. Angle exposes smart contracts and a client SDK rather than a documented public REST API.
url: https://raw.githubusercontent.com/api-evangelist/angle/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Stablecoins
- Decentralized Finance
- Blockchain
- Cryptocurrency
- Smart Contracts
- Ethereum
- SDK
apis:
- aid: angle:angle-allowances-api
  name: Angle Allowances API
  description: The Allowances API from Angle — 1 operation(s) for allowances.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Allowances
  properties:
  - type: OpenAPI
    url: openapi/angle-allowances-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-angle-protocol-data-api
  name: Angle Angle Protocol Data API
  description: The Angle Protocol Data API from Angle — 3 operation(s) for angle protocol data.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Angle Protocol Data
  properties:
  - type: OpenAPI
    url: openapi/angle-angle-protocol-data-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-app-api
  name: Angle App API
  description: The App API from Angle — 1 operation(s) for app.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - App
  properties:
  - type: OpenAPI
    url: openapi/angle-app-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-apr-api
  name: Angle Apr API
  description: The Apr API from Angle — 1 operation(s) for apr.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - APR
  tags_raw:
  - Apr
  properties:
  - type: OpenAPI
    url: openapi/angle-apr-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-balances-api
  name: Angle Balances API
  description: The Balances API from Angle — 1 operation(s) for balances.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Balances
  properties:
  - type: OpenAPI
    url: openapi/angle-balances-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-borrow-api
  name: Angle Borrow API
  description: The Borrow API from Angle — 4 operation(s) for borrow.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Borrow
  properties:
  - type: OpenAPI
    url: openapi/angle-borrow-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-bridge-api
  name: Angle Bridge API
  description: The Bridge API from Angle — 1 operation(s) for bridge.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Bridge
  properties:
  - type: OpenAPI
    url: openapi/angle-bridge-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-dao-api
  name: Angle Dao API
  description: The Dao API from Angle — 1 operation(s) for dao.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - DAO
  tags_raw:
  - Dao
  properties:
  - type: OpenAPI
    url: openapi/angle-dao-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-helpers-api
  name: Angle Helpers API
  description: The Helpers API from Angle — 5 operation(s) for helpers.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Helpers
  properties:
  - type: OpenAPI
    url: openapi/angle-helpers-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-incentives-api
  name: Angle Incentives API
  description: The Incentives API from Angle — 1 operation(s) for incentives.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Incentives
  properties:
  - type: OpenAPI
    url: openapi/angle-incentives-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-integrators-api
  name: Angle Integrators API
  description: The Integrators API from Angle — 6 operation(s) for integrators.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Integrators
  properties:
  - type: OpenAPI
    url: openapi/angle-integrators-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-perpetuals-api
  name: Angle Perpetuals API
  description: The Perpetuals API from Angle — 1 operation(s) for perpetuals.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Perpetuals
  properties:
  - type: OpenAPI
    url: openapi/angle-perpetuals-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-pools-api
  name: Angle Pools API
  description: The Pools API from Angle — 1 operation(s) for pools.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Pools
  properties:
  - type: OpenAPI
    url: openapi/angle-pools-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-prices-api
  name: Angle Prices API
  description: The Prices API from Angle — 1 operation(s) for prices.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Prices
  properties:
  - type: OpenAPI
    url: openapi/angle-prices-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-savings-api
  name: Angle Savings API
  description: The Savings API from Angle — 3 operation(s) for savings.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Savings
  properties:
  - type: OpenAPI
    url: openapi/angle-savings-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-tvl-api
  name: Angle Tvl API
  description: The Tvl API from Angle — 1 operation(s) for tvl.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - TVL
  tags_raw:
  - Tvl
  properties:
  - type: OpenAPI
    url: openapi/angle-tvl-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-user-related-information-api
  name: Angle User related information API
  description: The User related information API from Angle — 3 operation(s) for user related information.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - User related information
  properties:
  - type: OpenAPI
    url: openapi/angle-user-related-information-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-vaultmanagers-api
  name: Angle VaultManagers API
  description: The VaultManagers API from Angle — 1 operation(s) for vaultmanagers.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - VaultManagers
  properties:
  - type: OpenAPI
    url: openapi/angle-vaultmanagers-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-vaults-api
  name: Angle Vaults API
  description: The Vaults API from Angle — 1 operation(s) for vaults.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Vault
  tags_raw:
  - Vaults
  properties:
  - type: OpenAPI
    url: openapi/angle-vaults-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
- aid: angle:angle-volume-api
  name: Angle Volume API
  description: The Volume API from Angle — 1 operation(s) for volume.
  humanURL: https://angle.money
  baseURL: https://api.angle.money
  tags:
  - Volume
  properties:
  - type: OpenAPI
    url: openapi/angle-volume-api-openapi.yml
  - type: Authentication
    url: authentication/angle-authentication.yml
  - type: Conventions
    url: conventions/angle-conventions.yml
  - type: ErrorCatalog
    url: errors/angle-problem-types.yml
  - type: APIReference
    url: https://api.angle.money/api-docs/
  - type: DataModel
    url: data-model/angle-data-model.yml
common:
- type: MCPServer
  url: mcp/angle-mcp.yml
- type: IssueTracker
  url: https://github.com/AngleProtocol/angle-core/issues
- type: CodeOfConduct
  url: https://github.com/AngleProtocol/angle-core/blob/main/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/AngleProtocol/angle-core/blob/main/CONTRIBUTING.md
- type: License
  name: GPL-3.0
  url: https://github.com/AngleProtocol/angle-core/blob/main/LICENSE
- type: Authentication
  url: authentication/angle-authentication.yml
- type: DomainSecurity
  url: security/angle-domain-security.yml
- type: Website
  url: https://angle.money
- type: GitHubOrganization
  url: https://github.com/AngleProtocol
- type: SourceCode
  url: https://github.com/AngleProtocol/angle-core
- type: Packages
  url: packages/angle-packages.yml
- type: SDKs
  url: packages/angle-packages.yml
- type: Lifecycle
  url: lifecycle/angle-lifecycle.yml
- type: Deprecation
  url: lifecycle/angle-lifecycle.yml
- type: Conventions
  url: conventions/angle-conventions.yml
- type: ErrorCatalog
  url: errors/angle-problem-types.yml
- type: DataModel
  url: data-model/angle-data-model.yml
- type: Conformance
  url: conformance/angle-conformance.yml
- type: Overlay
  url: overlays/angle-api-openapi-overlay.yaml
- type: Overlay
  url: overlays/angle-api-openapi-github-overlay.yaml
- type: LLMsTxt
  url: llms/angle-llms.txt
- type: OpenAPI
  url: openapi/_original/angle-api-openapi.json
- type: AgentSkill
  url: skills/_index.yml
- type: Documentation
  url: https://github.com/AngleProtocol/angle-docs
- type: TermsOfService
  url: https://angle.money/terms
- type: PrivacyPolicy
  url: https://angle.money/privacy
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: enriched
  artifacts_added: 22
  pass: local-v1