# Airstack

**Canonical:** https://apis.io/providers/airstack/  
**APIs profiled:** 14

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.

## Kin Score — 26.4 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 26.4).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 53.4 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 14.3 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

Regulatory layer — **Payments**: 26.6 (matched via tags).

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (14)

- **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.

## Agentic access (1)

- **Airstack Agentic Access** — 27 operations · 5 acting

## Security (2)

- **Airstack Authentication** — apiKey · 2 schemes
- **Airstack Domain Security** — TLSv1.3 · DNSSEC · DMARC

## Tags

Web3, Blockchain, GraphQL, NFT, Tokens, On-Chain Data, Ethereum, Polygon, Base, ENS, POAP, Social Graph, Wallets, Identity

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/airstack/). Scores are computed from the provider's own public artifacts under a published rubric.