Etherscan

Etherscan is the leading blockchain explorer, search, API, and analytics platform for Ethereum and other EVM-compatible chains. It allows users to easily access and explore blockchain data, including transaction histories, smart contracts, token balances, and network activity. Etherscan's unified V2 API covers 60+ chains under a single account and API key, with a free tier offering 100,000 daily calls and paid tiers up to enterprise.

Etherscan publishes 1 API contract indexed on the APIs.io network: Accounts API. Tagged areas include Blockchain, Cryptocurrency, Ethereum, EVM, and Web3.

The Etherscan catalog on APIs.io includes 1 Spectral governance ruleset.

Etherscan’s developer surface includes authentication, developer portal, documentation, pricing, signup flow, engineering blog, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

38.1/100 thin ▬ flat Agent 31/100 agent ready Front door AI 1/6 silent Heartbeat 66/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers

Blockchain Cryptocurrency Ethereum EVM Web3

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 38.1/100 · thin

Contract Quality 10.3 / 21

Developer Ergonomics 4.0 / 17

Access Clarity 7.2 / 17

Operational Transparency 2.3 / 11

Contract Governance 1.4 / 10

Discoverability 6.4 / 9

Regulatory Posture 3.2 / 15

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, 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.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

5 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Developer Ergonomics scores 23.8 — up to +15.2 composite points
Contract Quality scores 48.4 — up to +12.9 composite points
Access Clarity scores 42.1 — up to +11.6 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/etherscan/apis.yml: open an issue on github.com/api-evangelist/etherscan to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Browser Extension Stores (company-published Firefox add-ons; Chrome Web Store unreadable)	builds-on	17.2 (thin)	1	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Etherscan Accounts API

Address balances, transactions, and token holdings

Open Collections 8

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

Etherscan Accounts API

OPEN COLLECTION

Etherscan Accounts Blocks API

OPEN COLLECTION

Etherscan Accounts Contracts API

OPEN COLLECTION

Etherscan Accounts Gas Tracker API

OPEN COLLECTION

Etherscan Accounts Stats API

OPEN COLLECTION

Etherscan Accounts Tokens API

OPEN COLLECTION

Etherscan Accounts Transactions API

OPEN COLLECTION

Etherscan API

OPEN COLLECTION

Scroll for all 8

MCP Servers 1

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

Etherscan MCP Server

Remote MCP server at mcp.etherscan.io over HTTP.

MCP SERVER

Etherscan API pricing

Not yet checked against Etherscan's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Etherscan's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Etherscan Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Etherscan Rate Limits

5 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Etherscan

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Etherscan Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Etherscan API Rules

61 rules · 59 errors 1 warnings 1 info

SPECTRAL

Security Posture 3

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

Etherscan Authentication

apiKey · 1 scheme

SECURITY

Etherscan Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Etherscan Vulnerability Disclosure

no policy recorded

SECURITY

Agentic Access 1

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

Etherscan Agentic Access

1 operation

1 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

Signup

Signup

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Source (apis.yml)

aid: etherscan
name: Etherscan
description: Etherscan is the leading blockchain explorer, search, API, and analytics platform for Ethereum and other EVM-compatible
  chains. It allows users to easily access and explore blockchain data, including transaction histories, smart contracts,
  token balances, and network activity. Etherscan's unified V2 API covers 60+ chains under a single account and API key, with
  a free tier offering 100,000 daily calls and paid tiers up to enterprise.
url: https://raw.githubusercontent.com/api-evangelist/etherscan/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/etherscan.png
type: Index
position: Consuming
access: 3rd-Party
created: '2025-02-17'
modified: '2026-05-19'
specificationVersion: '0.23'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
x-docs-hosting: vercel
tags:
- Blockchain
- Cryptocurrency
- Ethereum
- EVM
- Web3
apis:
- aid: etherscan:etherscan-accounts-api
  name: Etherscan Accounts API
  description: Address balances, transactions, and token holdings
  humanURL: https://docs.etherscan.io/
  baseURL: https://api.etherscan.io/v2/api
  tags:
  - Account
  tags_raw:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/etherscan-accounts-api-openapi.yml
  - type: Documentation
    url: https://docs.etherscan.io/
  - type: Pricing
    url: https://etherscan.io/apis
  - type: Signup
    url: https://etherscan.io/myapikey
  - type: TermsOfService
    url: https://etherscan.io/apiterms
common:
- type: Plans
  url: plans/etherscan-plans-pricing.yml
- type: RateLimits
  url: rate-limits/etherscan-rate-limits.yml
- type: FinOps
  url: finops/etherscan-finops.yml
- type: Website
  url: https://www.etherscan.io/
- type: AgenticAccess
  url: agentic-access/etherscan-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/etherscan-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/etherscan-domain-security.yml
- type: Authentication
  url: authentication/etherscan-authentication.yml
- type: GitHubOrganization
  url: https://github.com/etherscan
- type: LinkedIn
  url: https://www.linkedin.com/company/etherscan
- url: https://etherscan.io/
  type: Portal
- url: https://docs.etherscan.io/
  type: Documentation
- url: https://etherscan.io/apis
  type: Pricing
- url: https://etherscan.io/apiterms
  type: TermsOfService
- url: https://etherscan.io/myapikey
  type: Signup
- type: LlmsText
  url: https://docs.etherscan.io/llms.txt
- type: Blog
  url: https://medium.com/feed/etherscan-blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Etherscan API — frequently asked questions

Does Etherscan have an API?

Yes. APIs.io lists 1 API from Etherscan, including Etherscan Accounts API.

Is there an OpenAPI specification for the Etherscan API?

Yes. APIs.io indexes 1 OpenAPI specification for Etherscan, each linked for download from this page.

How do I authenticate with the Etherscan API?

Etherscan uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Etherscan Authentication.

How much does the Etherscan API cost?

APIs.io lists 3 pricing plans for Etherscan, with each plan's price, limits and inclusions under Pricing on this page.

Does Etherscan have an MCP server?

Yes. APIs.io lists 1 MCP server for Etherscan: Remote MCP server at mcp.etherscan.io over HTTP.

Is the Etherscan API ready for AI agents?

Etherscan has a Kin Score of 38.1 out of 100 (thin) and an Agent Readiness score of 30.7 (agent-ready), scored by API Evangelist on 2026-11-06.

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Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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