Aleo

Aleo is a privacy-first, zero-knowledge Layer-1 blockchain for building fully private applications. Developers write smart contracts in Leo — a purpose-built language for zero-knowledge applications — compile them with snarkVM, and run them on the decentralized snarkOS network, keeping inputs, outputs, and program state private using zk-SNARK proofs while still being publicly verifiable. The ecosystem, developed by Provable (ProvableHQ), includes the Leo language and CLI, the snarkVM zkVM and snarkOS operating system, JavaScript/TypeScript and Python SDKs, a WASM runtime for in-browser proving, the Aleo Explorer, and a public node REST API for reading on-chain state and broadcasting transactions across mainnet and testnet. Aleo is a portfolio company of a16z.

Aleo publishes 5 APIs on the APIs.io network, including Blocks API, Chain API, Network API, and 2 more. Tagged areas include Company, Blockchain, Zero Knowledge, Cryptography, and Privacy.

Aleo’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, sandbox, CLI, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

41.9/100 developing ▬ flat Agent 24/100 agent aware Front door AI 1/6 silent Full breakdown ↓
scored 2026-09-19 · rubric v0.22.0

1 APIs

Company Blockchain Zero Knowledge Cryptography Privacy Web3 Developer Tools Cryptocurrency Smart Contracts

Kin Score

Kin Score How this is scored →
scored 2026-09-19 · rubric v0.22.0

Composite quality — 41.9/100 · developing

Contract Quality 11.3 / 23

Developer Ergonomics 13.8 / 18

Access Clarity 1.9 / 18

Operational Transparency 4.0 / 12

Contract Governance 0.5 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 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 0 / 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 Well-Known Document 0 / 5

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.

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/aleo: 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 5

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

Aleo Blocks API

Block and transaction queries

Aleo Chain API

Latest chain state

Aleo Network API

Committee and consensus state

Aleo Programs API

Deployed program and mapping queries

Aleo Transactions API

Transaction submission

Open Collections 6

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

API Collection

OPEN COLLECTION

Aleo Node REST Blocks API

OPEN COLLECTION

Aleo Node REST Blocks Chain API

OPEN COLLECTION

Aleo Node REST Blocks Network API

OPEN COLLECTION

Aleo Node REST Blocks Programs API

OPEN COLLECTION

Aleo Node REST Blocks Transactions API

OPEN COLLECTION

Security Posture 2

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

Aleo Authentication

none · 0 schemes

SECURITY

Aleo Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Aleo Agentic Access

13 operations · 1 acting

AGENTIC

Resources

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 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

X-MCPServerCandidate

AgentSkill

WellKnown

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

ChangeLog

ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

Playground

Playground

Overlay

Overlay

Source (apis.yml)

aid: aleo
name: Aleo
description: Aleo is a privacy-first, zero-knowledge Layer-1 blockchain for building fully private applications. Developers
  write smart contracts in Leo — a purpose-built language for zero-knowledge applications — compile them with snarkVM, and
  run them on the decentralized snarkOS network, keeping inputs, outputs, and program state private using zk-SNARK proofs
  while still being publicly verifiable. The ecosystem, developed by Provable (ProvableHQ), includes the Leo language and
  CLI, the snarkVM zkVM and snarkOS operating system, JavaScript/TypeScript and Python SDKs, a WASM runtime for in-browser
  proving, the Aleo Explorer, and a public node REST API for reading on-chain state and broadcasting transactions across mainnet
  and testnet. Aleo is a portfolio company of a16z.
url: https://raw.githubusercontent.com/api-evangelist/aleo/refs/heads/main/apis.yml
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: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://aleo.org/social.webp
x-type: company
x-source: a16z-portfolio
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-09-16'
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-17
tags:
- Company
- Blockchain
- Zero Knowledge
- Cryptography
- Privacy
- Web3
- Developer Tools
- Cryptocurrency
- Smart Contracts
tags_raw:
- Company
- Blockchain
- Zero-Knowledge
- Cryptography
- Privacy
- Web3
- Developer Tools
- Cryptocurrency
- Smart Contracts
apis:
- aid: aleo:aleo-blocks-api
  name: Aleo Blocks API
  description: Block and transaction queries
  humanURL: https://docs.aleo.org/
  baseURL: https://api.explorer.provable.com/v1
  tags:
  - Blocks
  properties:
  - type: OpenAPI
    url: openapi/aleo-blocks-api-openapi.yml
  - type: Documentation
    url: https://docs.aleo.org/
- aid: aleo:aleo-chain-api
  name: Aleo Chain API
  description: Latest chain state
  humanURL: https://docs.aleo.org/
  baseURL: https://api.explorer.provable.com/v1
  tags:
  - Chain
  properties:
  - type: OpenAPI
    url: openapi/aleo-chain-api-openapi.yml
  - type: Documentation
    url: https://docs.aleo.org/
- aid: aleo:aleo-network-api
  name: Aleo Network API
  description: Committee and consensus state
  humanURL: https://docs.aleo.org/
  baseURL: https://api.explorer.provable.com/v1
  tags:
  - Networks
  tags_raw:
  - Network
  properties:
  - type: OpenAPI
    url: openapi/aleo-network-api-openapi.yml
  - type: Documentation
    url: https://docs.aleo.org/
- aid: aleo:aleo-programs-api
  name: Aleo Programs API
  description: Deployed program and mapping queries
  humanURL: https://docs.aleo.org/
  baseURL: https://api.explorer.provable.com/v1
  tags:
  - Programs
  properties:
  - type: OpenAPI
    url: openapi/aleo-programs-api-openapi.yml
  - type: Documentation
    url: https://docs.aleo.org/
- aid: aleo:aleo-transactions-api
  name: Aleo Transactions API
  description: Transaction submission
  humanURL: https://docs.aleo.org/
  baseURL: https://api.explorer.provable.com/v1
  tags:
  - Transaction
  tags_raw:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/aleo-transactions-api-openapi.yml
  - type: Documentation
    url: https://docs.aleo.org/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://aleo.org
- type: DomainSecurity
  url: security/aleo-domain-security.yml
- type: AgenticAccess
  url: agentic-access/aleo-agentic-access.yml
- type: DeveloperPortal
  url: https://docs.aleo.org/
- type: Documentation
  url: https://docs.aleo.org/
- type: APIReference
  url: https://docs.aleo.org/build/sdk/overview/
- type: GettingStarted
  url: https://docs.aleo.org/build/getting-started/
- type: GitHubOrganization
  url: https://github.com/ProvableHQ
- type: Blog
  url: https://provable.com/blog
- type: Support
  url: https://discord.gg/aleo
- type: Sandbox
  url: sandbox/aleo-sandbox.yml
- type: Playground
  url: https://play.leo-lang.org/
- type: PrivacyPolicy
  url: https://provable.com/privacy
- type: StatusPage
  url: https://status.aleo.org/
- type: X
  url: https://x.com/provablehq
- type: Packages
  url: packages/aleo-packages.yml
- type: SDKs
  url: packages/aleo-packages.yml
- type: CLI
  url: cli/aleo-cli.yml
- type: X-MCPServerCandidate
  url: mcp/aleo-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: AgentSkill
  url: skills/_index.yml
- type: WellKnown
  url: well-known/aleo-well-known.yml
- type: LLMsTxt
  url: llms/aleo-llms.txt
- type: Overlay
  url: overlays/aleo-node-api-overlay.yaml
- type: Conformance
  url: conformance/aleo-conformance.yml
- type: ErrorCatalog
  url: errors/aleo-problem-types.yml
- type: Lifecycle
  url: lifecycle/aleo-lifecycle.yml
- type: Authentication
  url: authentication/aleo-authentication.yml
- type: Conventions
  url: conventions/aleo-conventions.yml
- type: ChangeLog
  url: changelog/aleo-changelog.yml
- type: DataModel
  url: data-model/aleo-data-model.yml

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