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 1 API on the APIs.io network: Node REST API. 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 22 more developer resources.

🌐 Visit website 📡 Source on GitHub
46.6/100 developing Agent 69/100 agent native Full breakdown ↓
scored 2026-07-20 · rubric v0.4
1 APIs 1 MCP Servers 0 Features
CompanyBlockchainZero-KnowledgeCryptographyPrivacyWeb3Developer ToolsCryptocurrencySmart Contracts

API Rating

API Evangelist API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4
Composite quality — 46.6/100 · developing
Contract Quality 13.1 / 25
Developer Ergonomics 17.4 / 20
Commercial Clarity 2.1 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 69/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 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
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/aleo: 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

Aleo Node REST API

The public REST API exposed by Aleo network nodes (snarkOS), served through Provable's public gateway. Read on-chain state — latest block height/hash/state root, blocks and tran...

MCP Servers

aleo-mcp.yml

MCP SERVER

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
 MCPServer
MCPServer
 AgentSkill
AgentSkill
 WellKnown
WellKnown
 LLMsTxt
LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conventions
Conventions
 DataModel
DataModel

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
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 1

The organization behind the API

Blog
Blog

Other 3

Properties that don't map to a standard resource type

Playground
Playground
 X
X
 Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
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
image: https://aleo.org/social.webp
x-type: company
x-source: a16z-portfolio
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-17'
tags:
- Company
- Blockchain
- Zero-Knowledge
- Cryptography
- Privacy
- Web3
- Developer Tools
- Cryptocurrency
- Smart Contracts
apis:
- name: Aleo Node REST API
  description: The public REST API exposed by Aleo network nodes (snarkOS), served through Provable's public gateway. Read
    on-chain state — latest block height/hash/state root, blocks and transactions, deployed programs and their mappings, and
    the validator committee — and broadcast signed transactions to mainnet or testnet.
  humanURL: https://docs.aleo.org/
  baseURL: https://api.explorer.provable.com/v1
  tags:
  - Blockchain
  - Zero-Knowledge
  - Node API
  properties:
  - type: OpenAPI
    url: openapi/aleo-node-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: 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: MCPServer
  url: mcp/aleo-mcp.yml
- 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