Airstack website screenshot

Airstack

Airstack is a Web3 data aggregation platform providing GraphQL and REST APIs for querying on-chain and off-chain data across multiple blockchains. Developers can query NFT ownership, token balances, wallet identities, ENS names, POAP badges, and cross-chain data in a single composable request. The platform indexes Ethereum, Polygon, Base, and other EVM-compatible chains, enabling complex cross-project queries without running your own infrastructure.

Airstack publishes 13 APIs on the APIs.io network, including Casts API, FIDs API, HubEvents API, and 10 more. Tagged areas include Web3, Blockchain, GraphQL, NFT, and Tokens.

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

Airstack’s developer surface includes authentication, GitHub presence, engineering blog, and 13 more developer resources.

📡 Source on GitHub
29.1/100 thin ▬ flat Agent 22/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
2 APIs
Web3BlockchainGraphQLNFTTokensOn-Chain DataEthereumPolygonBaseENSPOAPSocial GraphWalletsIdentity

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 29.1/100 · thin
Contract Quality 9.8 / 19
Developer Ergonomics 5.4 / 15
Access Clarity 0.0 / 15
Operational Transparency 0.5 / 10
Contract Governance 2.3 / 9
Discoverability 5.1 / 8
Regulatory Posture 4.0 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 22/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 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 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Payments 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/. 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 github.com/api-evangelist/airstack: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 14

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

Airstack GraphQL API

The primary Airstack API offering composable GraphQL queries across on-chain and off-chain Web3 data. Query NFT balances, token transfers, wallet identities, ENS names, POAP bad...

Airstack Casts API

The Casts API from Airstack — 4 operation(s) for casts.

Airstack FIDs API

The FIDs API from Airstack — 1 operation(s) for fids.

Airstack HubEvents API

The HubEvents API from Airstack — 2 operation(s) for hubevents.

Airstack Links API

The Links API from Airstack — 3 operation(s) for links.

Airstack OnChainEvents API

The OnChainEvents API from Airstack — 3 operation(s) for onchainevents.

Airstack Reactions API

The Reactions API from Airstack — 4 operation(s) for reactions.

Airstack Storage API

The Storage API from Airstack — 1 operation(s) for storage.

Airstack SubmitMessage API

The SubmitMessage API from Airstack — 1 operation(s) for submitmessage.

Airstack UserData API

The UserData API from Airstack — 1 operation(s) for userdata.

Airstack Usernames API

The Usernames API from Airstack — 2 operation(s) for usernames.

Airstack ValidateMessage API

The ValidateMessage API from Airstack — 1 operation(s) for validatemessage.

Airstack Verifications API

The Verifications API from Airstack — 1 operation(s) for verifications.

Airstack Webhooks API

The Webhooks API from Airstack — 3 operation(s) for webhooks.

Scroll for all 14

Open Collections 14

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

API Collection

OPEN COLLECTION

Farcaster Hub REST Casts API

OPEN COLLECTION

Farcaster Hub REST Casts FIDs API

OPEN COLLECTION

Farcaster Hub REST Casts HubEvents API

OPEN COLLECTION

Farcaster Hub REST Casts Links API

OPEN COLLECTION

Farcaster Hub REST Casts OnChainEvents API

OPEN COLLECTION

Farcaster Hub REST Casts Reactions API

OPEN COLLECTION

Farcaster Hub REST Casts Storage API

OPEN COLLECTION

Farcaster Hub REST Casts SubmitMessage API

OPEN COLLECTION

Farcaster Hub REST Casts UserData API

OPEN COLLECTION

Farcaster Hub REST Casts Usernames API

OPEN COLLECTION

Farcaster Hub REST Casts ValidateMessage API

OPEN COLLECTION

Farcaster Hub REST Casts Verifications API

OPEN COLLECTION

Farcaster Hub REST Casts Webhooks API

OPEN COLLECTION

Scroll for all 14

GraphQL 1

GraphQL schemas published by this provider.

Airstack GraphQL API

Airstack exposes a composable GraphQL API for querying on-chain and off-chain Web3 data across multiple EVM-compatible blockchains. The API aggregates token balances, NFT metada...

GRAPHQL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Airstack API Rules

6 rules · 4 warnings 2 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Airstack Farcaster Hub API Schemas

0 properties

JSON SCHEMA

Security Posture 2

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

Airstack Authentication

apiKey · 2 schemes

SECURITY

Airstack Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Airstack Agentic Access

27 operations · 5 acting

27 operations · 5 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

JSONSchema
JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLDContext
JSONLDContext
 Vocabulary
Vocabulary

Build 5

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub
 WebSDK
WebSDK
 NodeSDK
NodeSDK
 PythonSDK
PythonSDK
 FramesSDK
FramesSDK

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Company 2

The organization behind the API

Blog
Blog
 LinkedIn
LinkedIn

Other 3

Properties that don't map to a standard resource type

Explorer
Explorer
 Dashboard
Dashboard
 Telegram
Telegram

Source (apis.yml)

apis.yml Raw ↑ 
name: Airstack
description: Airstack is a Web3 data aggregation platform providing GraphQL and REST APIs for querying on-chain and off-chain
  data across multiple blockchains. Developers can query NFT ownership, token balances, wallet identities, ENS names, POAP
  badges, and cross-chain data in a single composable request. The platform indexes Ethereum, Polygon, Base, and other EVM-compatible
  chains, enabling complex cross-project queries without running your own infrastructure.
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/airstack.png
url: https://raw.githubusercontent.com/api-evangelist/airstack/refs/heads/main/apis.yml
created: '2024-01-01'
modified: '2026-06-13'
specificationVersion: '0.23'
tags:
- Web3
- Blockchain
- GraphQL
- NFT
- Tokens
- On-Chain Data
- Ethereum
- Polygon
- Base
- ENS
- POAP
- Social Graph
- Wallets
- Identity
tags_raw:
- Web3
- Blockchain
- GraphQL
- NFT
- Tokens
- On-Chain Data
- Ethereum
- Polygon
- Base
- ENS
- POAP
- Social Graph
- Wallet
- Identity
apis:
- name: Airstack GraphQL API
  description: The primary Airstack API offering composable GraphQL queries across on-chain and off-chain Web3 data. Query
    NFT balances, token transfers, wallet identities, ENS names, POAP badges, and social graph data across Ethereum, Polygon,
    Base, and other EVM chains. Supports cross-chain and cross-project queries in a single request with cursor-based pagination.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - GraphQL
  - Web3
  - NFT
  - Tokens
  - Blockchain
  - Ethereum
  - Polygon
  - Base
  - ENS
  - POAP
  - Identity
  - Wallets
  tags_raw:
  - GraphQL
  - Web3
  - NFT
  - Tokens
  - Blockchain
  - Ethereum
  - Polygon
  - Base
  - ENS
  - POAP
  - Identity
  - Wallet
  properties:
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: Authentication
    url: https://docs.airstack.xyz/airstack-docs-and-faqs/get-api-key
  - type: GettingStarted
    url: https://docs.airstack.xyz/airstack-docs-and-faqs/basics
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/airstack/refs/heads/main/rate-limits/graphql-api.md
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/airstack/refs/heads/main/plans/plans.md
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/airstack/refs/heads/main/finops/finops.md
  - url: graphql/airstack-graphql.md
    type: GraphQL
  contact:
  - FN: Airstack Support
    url: https://t.me/+1k3c2FR7z51mNDRh
    email: ''
- aid: airstack:airstack-casts-api
  name: Airstack Casts API
  description: The Casts API from Airstack — 4 operation(s) for casts.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - Casts
  properties:
  - type: OpenAPI
    url: openapi/airstack-casts-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-fids-api
  name: Airstack FIDs API
  description: The FIDs API from Airstack — 1 operation(s) for fids.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - FIDs
  properties:
  - type: OpenAPI
    url: openapi/airstack-fids-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-hubevents-api
  name: Airstack HubEvents API
  description: The HubEvents API from Airstack — 2 operation(s) for hubevents.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - HubEvents
  properties:
  - type: OpenAPI
    url: openapi/airstack-hubevents-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-links-api
  name: Airstack Links API
  description: The Links API from Airstack — 3 operation(s) for links.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - Links
  properties:
  - type: OpenAPI
    url: openapi/airstack-links-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-onchainevents-api
  name: Airstack OnChainEvents API
  description: The OnChainEvents API from Airstack — 3 operation(s) for onchainevents.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - OnChainEvents
  properties:
  - type: OpenAPI
    url: openapi/airstack-onchainevents-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-reactions-api
  name: Airstack Reactions API
  description: The Reactions API from Airstack — 4 operation(s) for reactions.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - Reactions
  properties:
  - type: OpenAPI
    url: openapi/airstack-reactions-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-storage-api
  name: Airstack Storage API
  description: The Storage API from Airstack — 1 operation(s) for storage.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - Storage
  properties:
  - type: OpenAPI
    url: openapi/airstack-storage-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-submitmessage-api
  name: Airstack SubmitMessage API
  description: The SubmitMessage API from Airstack — 1 operation(s) for submitmessage.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - SubmitMessage
  properties:
  - type: OpenAPI
    url: openapi/airstack-submitmessage-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-userdata-api
  name: Airstack UserData API
  description: The UserData API from Airstack — 1 operation(s) for userdata.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - User Data
  tags_raw:
  - UserData
  properties:
  - type: OpenAPI
    url: openapi/airstack-userdata-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-usernames-api
  name: Airstack Usernames API
  description: The Usernames API from Airstack — 2 operation(s) for usernames.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - User Names
  tags_raw:
  - Usernames
  properties:
  - type: OpenAPI
    url: openapi/airstack-usernames-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-validatemessage-api
  name: Airstack ValidateMessage API
  description: The ValidateMessage API from Airstack — 1 operation(s) for validatemessage.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - ValidateMessage
  properties:
  - type: OpenAPI
    url: openapi/airstack-validatemessage-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-verifications-api
  name: Airstack Verifications API
  description: The Verifications API from Airstack — 1 operation(s) for verifications.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - Verification
  tags_raw:
  - Verifications
  properties:
  - type: OpenAPI
    url: openapi/airstack-verifications-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
- aid: airstack:airstack-webhooks-api
  name: Airstack Webhooks API
  description: The Webhooks API from Airstack — 3 operation(s) for webhooks.
  humanURL: https://docs.airstack.xyz/
  baseURL: https://api.airstack.xyz/graphql
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/airstack-webhooks-api-openapi.yml
  - type: Documentation
    url: https://docs.airstack.xyz/
  - type: DeprecationNotice
    url: https://docs.airstack.xyz/
common:
- type: AgenticAccess
  url: agentic-access/airstack-agentic-access.yml
- type: DomainSecurity
  url: security/airstack-domain-security.yml
- type: Authentication
  url: authentication/airstack-authentication.yml
- type: JSONLDContext
  url: https://raw.githubusercontent.com/api-evangelist/airstack/refs/heads/main/json-ld/airstack-context.json
- type: Vocabulary
  url: https://raw.githubusercontent.com/api-evangelist/airstack/refs/heads/main/vocabulary/airstack-vocabulary.json
- type: JSONSchema
  url: https://raw.githubusercontent.com/api-evangelist/airstack/refs/heads/main/json-schema/farcaster-hub-api-schemas.json
- type: GitHub
  url: https://github.com/Airstack-xyz
- type: WebSDK
  url: https://github.com/Airstack-xyz/airstack-web-sdk
- type: NodeSDK
  url: https://github.com/Airstack-xyz/airstack-node-sdk
- type: PythonSDK
  url: https://github.com/Airstack-xyz/airstack-python-sdk
- type: FramesSDK
  url: https://github.com/Airstack-xyz/airstack-frames-sdk
- type: Explorer
  url: https://explorer.airstack.xyz
- type: Dashboard
  url: https://app.airstack.xyz
- type: Blog
  url: https://blog.airstack.xyz
- type: Telegram
  url: https://t.me/+1k3c2FR7z51mNDRh
- type: LinkedIn
  url: https://www.linkedin.com/company/airstack-xyz
maintainers:
- FN: API Evangelist
  url: https://apievangelist.com
  email: info@apievangelist.com

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