Nansen website screenshot

Nansen

Nansen is an onchain analytics platform with wallet labeling, smart-money tracking, token screener, portfolio, prediction markets, and AI Agent endpoints across 30+ chains. The Nansen API exposes REST endpoints under api.nansen.ai with Smart Money, Profiler, Token Screener, Portfolio, Points, Hyperliquid, Agent, and Prediction Markets categories.

Nansen publishes 1 API on the APIs.io network: Smart Money API. Tagged areas include Web3, Crypto, Onchain, Wallet Labels, and Smart Money.

Nansen’s developer surface includes authentication, developer portal, documentation, pricing, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
28.1/100 thin ▬ flat Agent 23/100 agent aware saas Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0
AccessPaid
1 APIs
Web3CryptoOnchainWallet LabelsSmart MoneyAnalyticsMulti-Chain

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0
Composite quality — 28.1/100 · thin
Contract Quality 10.1 / 21
Developer Ergonomics 5.7 / 17
Access Clarity 2.2 / 17
Operational Transparency 1.2 / 11
Contract Governance 0.0 / 10
Discoverability 6.5 / 9
Regulatory Posture 2.8 / 15
Agent readiness — 23/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 6 / 6
MCP Server 0 / 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
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 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/.
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/nansen: 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 2

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

Nansen REST API

REST API surfacing Nansen's on-chain intelligence: smart-money flows, profiler (wallet labels and balances), token screener, portfolio, points, Hyperliquid analytics, prediction...

Nansen Smart Money API

Smart-money wallet flows and behavior.

Open Collections 3

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

API Collection

OPEN COLLECTION

Nansen REST Smart Money API

OPEN COLLECTION

Nansen REST API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Nansen Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Nansen Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Nansen Finops

FINOPS

Security Posture 2

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

Nansen Authentication

apiKey · 1 scheme

SECURITY

Nansen Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Nansen Agentic Access

6 operations

6 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal
Portal

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 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

Website
Website
 LinkedIn
LinkedIn
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: nansen
url: https://raw.githubusercontent.com/api-evangelist/nansen/refs/heads/main/apis.yml
name: Nansen
kind: company
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nansen.png
tags:
- Web3
- Crypto
- Onchain
- Wallet Labels
- Smart Money
- Analytics
- Multi-Chain
tags_raw:
- Web3
- Crypto
- On-Chain
- Wallet Labels
- Smart Money
- Analytics
- Multi-chain
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.23'
description: Nansen is an onchain analytics platform with wallet labeling, smart-money tracking, token screener, portfolio,
  prediction markets, and AI Agent endpoints across 30+ chains. The Nansen API exposes REST endpoints under api.nansen.ai
  with Smart Money, Profiler, Token Screener, Portfolio, Points, Hyperliquid, Agent, and Prediction Markets categories.
apis:
- aid: nansen:rest-api
  name: Nansen REST API
  tags:
  - Onchain
  - Smart Money
  - Wallet Labels
  - Token Screener
  - Portfolio
  - Multi-Chain
  tags_raw:
  - On-Chain
  - Smart Money
  - Wallet Labels
  - Token Screener
  - Portfolio
  - Multi-chain
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.nansen.ai/api/v1
  humanURL: https://docs.nansen.ai/
  description: 'REST API surfacing Nansen''s on-chain intelligence: smart-money flows, profiler (wallet labels and balances),
    token screener, portfolio, points, Hyperliquid analytics, prediction markets, and the Nansen Agent AI endpoint. Authentication
    via apiKey header. Throttled at 20 requests per second and 300 per minute by default.'
  properties:
  - type: Documentation
    url: https://docs.nansen.ai/
  - type: Pricing
    url: https://www.nansen.ai/pricing
  x-features:
  - 30+ chains coverage
  - Smart-money wallet flows
  - 300M+ wallet labels
  - Token screener
  - AI Agent endpoint
  x-use-cases:
  - Trading signal generation
  - Wallet attribution
  - Portfolio compliance and surveillance
- aid: nansen:nansen-smart-money-api
  name: Nansen Smart Money API
  description: Smart-money wallet flows and behavior.
  humanURL: https://docs.nansen.ai/
  baseURL: https://api.nansen.ai/api/v1
  tags:
  - Smart Money
  properties:
  - type: OpenAPI
    url: openapi/nansen-smart-money-api-openapi.yml
common:
- type: Website
  url: https://www.nansen.ai/
- type: AgenticAccess
  url: agentic-access/nansen-agentic-access.yml
- type: DomainSecurity
  url: security/nansen-domain-security.yml
- type: Authentication
  url: authentication/nansen-authentication.yml
- type: GitHubOrganization
  url: https://github.com/nansen-ai
- type: LinkedIn
  url: https://www.linkedin.com/company/nansen
- type: Portal
  url: https://www.nansen.ai/
- type: Documentation
  url: https://docs.nansen.ai/
- type: Pricing
  url: https://www.nansen.ai/pricing
- type: Plans
  url: plans/nansen-plans-pricing.yml
- type: RateLimits
  url: rate-limits/nansen-rate-limits.yml
- type: FinOps
  url: finops/nansen-finops.yml
- type: LlmsText
  url: https://docs.nansen.ai/llms.txt
- type: Blog
  url: https://nansen.ai/blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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