aid: ethgas
name: ETHGas
description: >-
  ETHGas is an Ethereum blockspace exchange that turns Ethereum blockspace into a
  tradable commodity, enabling instant transactions through preconfirmations
  (execution and inclusion preconfs), whole-block commitments, and base-fee
  futures. Its public developer platform exposes a v1 REST API and a WebSocket
  streaming API for market data, order placement and management, funding
  (collateral deposits and withdrawals), and validator/builder registration.
  Authentication uses an EIP-712 wallet-signature login that issues a short-lived
  JWT bearer token; public market-data endpoints under /api/v1/p require none.
  ETHGas runs on Ethereum mainnet with a Hoodi testnet environment, and backs the
  exchange with a Commit-Boost validator module and a modified rbuilder block
  builder. ETHGas is backed by Polychain.
url: https://raw.githubusercontent.com/api-evangelist/ethgas/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- polychain
x-tier: stub
x-tier-reason: portfolio-lead
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
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
image: https://ethgas.com/favicon.ico
tags:
- Company
- Infrastructure
- Blockchain
- Ethereum
- Trading
- Preconfirmations
- Blockspace
- MEV
- DeFi
- Web3
apis:
- name: ETHGas API
  description: >-
    ETHGas v1 REST + WebSocket API for market data, order placement/management,
    funding (collateral deposits/withdrawals), and validator/builder operations
    across whole-block commitments and inclusion preconfirmations.
  humanURL: https://developers.ethgas.com
  baseURL: https://mainnet.app.ethgas.com
  tags:
  - Trading
  - Ethereum
  - Preconfirmations
  - Blockspace
  properties:
  - type: Authentication
    url: authentication/ethgas-authentication.yml
  - type: Conventions
    url: conventions/ethgas-conventions.yml
  - type: ErrorCatalog
    url: errors/ethgas-error-codes.yml
  - type: Lifecycle
    url: lifecycle/ethgas-lifecycle.yml
  - type: ChangeLog
    url: changelog/ethgas-changelog.yml
  - type: Sandbox
    url: sandbox/ethgas-sandbox.yml
  - type: Webhooks
    url: asyncapi/ethgas-websocket-webhooks.yml
  - type: MCPServer
    url: mcp/ethgas-mcp.yml
  - type: Conformance
    url: conformance/ethgas-conformance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://ethgas.com
- type: DeveloperPortal
  url: https://developers.ethgas.com
- type: Documentation
  url: https://docs.ethgas.com
- type: APIReference
  url: https://developers.ethgas.com
- type: GettingStarted
  url: https://docs.ethgas.com/developer-resources/technical-integration
- type: Blog
  url: https://ethgas.com/blog
- type: GitHubOrganization
  url: https://github.com/ethgas-developer
- type: Support
  url: https://discord.gg/ethgas
- type: SignUp
  url: https://app.ethgas.com
- type: TermsOfService
  url: https://ethgas.com/terms-of-service
- type: PrivacyPolicy
  url: https://ethgas.com/privacy-policy
- type: Authentication
  url: authentication/ethgas-authentication.yml
- type: Conventions
  url: conventions/ethgas-conventions.yml
- type: ErrorCatalog
  url: errors/ethgas-error-codes.yml
- type: Lifecycle
  url: lifecycle/ethgas-lifecycle.yml
- type: ChangeLog
  url: changelog/ethgas-changelog.yml
- type: Sandbox
  url: sandbox/ethgas-sandbox.yml
- type: Webhooks
  url: asyncapi/ethgas-websocket-webhooks.yml
- type: MCPServer
  url: mcp/ethgas-mcp.yml
- type: Conformance
  url: conformance/ethgas-conformance.yml
- type: Packages
  url: packages/ethgas-packages.yml
- type: WellKnown
  url: well-known/ethgas-well-known.yml
- type: LLMsTxt
  url: llms/ethgas-llms.txt
- type: DomainSecurity
  url: security/ethgas-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence