ETHGas

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.

ETHGas publishes 1 API on the APIs.io network. Tagged areas include Company, Infrastructure, Blockchain, Ethereum, and Trading.

The ETHGas catalog on APIs.io includes 1 event-driven AsyncAPI specification.

ETHGas’ developer surface includes documentation, API reference, getting-started guide, engineering blog, support, signup flow, authentication, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

42.5/100 developing ▬ flat Agent 33/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessSelf serve

1 APIs 1 MCP Servers

CompanyInfrastructureBlockchainEthereumTradingPreconfirmationsBlockspaceMEVDeFiWeb3

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 42.5/100 · developing

Contract Quality 9.6 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 3.6 / 17

Operational Transparency 2.9 / 11

Contract Governance 1.9 / 10

Discoverability 6.5 / 9

Regulatory Posture 6.3 / 15

Agent readiness — 33/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data regime (on an ambiguous tag, where no other regime matched), so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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/ethgas: 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 1

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

ETHGas API

ETHGas v1 REST + WebSocket API for market data, order placement/management, funding (collateral deposits/withdrawals), and validator/builder operations across whole-block commit...

MCP Servers 1

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

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Webhooks

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

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: '0.23'
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

ETHGas

Kin Score

APIs 1

ETHGas API

MCP Servers 1

ETHGas MCP Server

Event Specifications 1

Ethgas Websocket Webhooks

Security Posture 2

Ethgas Authentication

Ethgas Domain Security

Resources