aid: espresso
name: Espresso
description: >-
  Espresso Systems builds the Espresso Network, a high-performance consensus and
  sequencing layer that gives rollups and institution-grade financial
  applications real-time settlement (~3 second finality) without sacrificing
  control, privacy, or connectivity to global onchain liquidity. The network is
  a permissionless delegated-proof-of-stake system (Mainnet 1.0, live) built on
  the HotShot BFT consensus protocol and the Tiramisu data-availability layer,
  confirming transactions for integrated Arbitrum Nitro/Orbit and OP Stack
  chains. Espresso nodes and query services expose a public, no-auth REST + WebSocket
  API (built on the Tide Disco framework) across modules for availability, node
  state, consensus status, catchup, explorer, events streaming, and transaction
  submission. The API is served on both the Ethereum-mainnet-anchored Mainnet and
  the Sepolia-anchored Decaf testnet, with content negotiation between JSON and
  binary and URL-path major versioning (v0 → v1).
url: https://raw.githubusercontent.com/api-evangelist/espresso/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- electric-capital
- greylock
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
image: https://www.espressosys.com/
tags:
- Company
- Blockchain
- Web3
- Infrastructure
- Consensus
- Sequencer
- Rollup
- Data Availability
- Ethereum
- DeFi
- REST API
- Cryptography
apis:
- name: Espresso Network Query Service API
  description: >-
    The public REST and WebSocket API served by Espresso query services and
    nodes (Tide Disco framework). Comprises independent modules — availability
    (Tiramisu DA blocks/headers/payloads/VID), node, status, catchup, state,
    explorer, hotshot-events streaming, and submit (post transactions to the
    public mempool) — each versioned via URL path (v0/v1) and negotiating JSON
    or binary via Content-Type/Accept. Read endpoints are unauthenticated; there
    is no "latest block" query — clients index by block height or hash.
  humanURL: https://docs.espressosys.com/network/developer/espresso-api
  baseURL: https://query.main.net.espresso.network/v1
  tags:
  - Blockchain
  - Consensus
  - Data Availability
  - Query
  - REST
  properties:
  - type: Documentation
    url: https://docs.espressosys.com/network/developer/espresso-api
  - type: APIReference
    url: https://docs.espressosys.com/network/developer/espresso-api
  - type: LLMsTxt
    url: llms/espresso-llms.txt
  - type: Authentication
    url: authentication/espresso-authentication.yml
  - type: Conventions
    url: conventions/espresso-conventions.yml
  - type: Webhooks
    url: asyncapi/espresso-events-webhooks.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.espressosys.com/
- type: DeveloperPortal
  url: https://docs.espressosys.com/
- type: Documentation
  url: https://docs.espressosys.com/network/developer/espresso-api
- type: APIReference
  url: https://docs.espressosys.com/network/developer/espresso-api
- type: GettingStarted
  url: https://docs.espressosys.com/network/learn/quickstart
- type: GitHubOrganization
  url: https://github.com/EspressoSystems
- type: Blog
  url: https://medium.com/@espressosys
- type: ChangeLog
  url: https://docs.espressosys.com/network/network/changelog
- type: PrivacyPolicy
  url: https://www.espressosys.com/privacy-policy
- type: Support
  url: https://discord.com/invite/DRfcHRnnBz
- type: LLMsTxt
  url: llms/espresso-llms.txt
- type: Authentication
  url: authentication/espresso-authentication.yml
- type: Conventions
  url: conventions/espresso-conventions.yml
- type: ChangeLog
  url: changelog/espresso-changelog.yml
- type: Lifecycle
  url: lifecycle/espresso-lifecycle.yml
- type: Conformance
  url: conformance/espresso-conformance.yml
- type: DomainSecurity
  url: security/espresso-domain-security.yml
- type: Webhooks
  url: asyncapi/espresso-events-webhooks.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence