Spindl

Spindl is a Web3 growth platform providing onchain attribution, web3-native analytics, audiences, short links, referrals, and ads in one place, helping developers understand where their users come from and how they behave across onchain apps. It offers a JavaScript/HTML SDK, Android and iOS SDKs, and a Server-to-Server REST API for campaign and attribution management, short (redirect) links, server-side custom event ingestion, and daily data exports. Positioned as Web3's answer to Mixpanel and Amplitude, Spindl is used by teams including Uniswap, Base, Safe, and Morpho. A separate publisher-facing Ads API on e.spindlembed.com serves targeted onchain ad recommendations and records impressions and clicks, with a React BannerEmbed component and a hosted iframe as no-code alternatives. Spindl announced in January 2025 that it was joining Coinbase and now operates as a product team inside Base. Originally added to the API Evangelist network as a portfolio-lead stub, now enriched from its published developer documentation and live host probes.

Spindl is listed with 3 APIs on the APIs.io network: Events API, Short Links API, and Ads API. Tagged areas include Company, Web3, Attribution, Analytics, and Marketing.

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

Spindl’s developer surface includes authentication, documentation, getting-started guide, engineering blog, signup flow, support, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

29.3/100 thin ▬ flat Agent 34/100 agent ready Front door AI 1/6 silent Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

3 APIs 3 Agent Skills

Company Web3 Attribution Analytics Marketing Growth SDK

Kin Score

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

Composite quality — 29.3/100 · thin

Contract Quality 2.6 / 19

Developer Ergonomics 9.9 / 15

Access Clarity 1.6 / 15

Operational Transparency 0.3 / 10

Contract Governance 1.6 / 9

Discoverability 5.9 / 8

Regulatory Posture 3.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 34/100 · agent ready

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 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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

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 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/.

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
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)

7 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 14.1 — up to +21.5 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Operational Transparency scores 2.6 — up to +12.7 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/spindl/apis.yml: open an issue on github.com/api-evangelist/spindl 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 →

Standards implemented 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 3

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

Spindl Events API

Server-side custom event ingestion for attribution.

Spindl Short Links API

Redirect links mapping a Spindl link to a destination URL.

Spindl Ads API

Publisher-facing onchain advertising API. Fetch targeted ad recommendations for a wallet address at a named placement, render the returned unit, and post impressions and clicks ...

Open Collections 2

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

Spindl Server-to-Server Events API

OPEN COLLECTION

Spindl Server-to-Server Events Short Links API

OPEN COLLECTION

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

Create and list Spindl tracking links

AGENT SKILL

Send server-side custom events to Spindl

AGENT SKILL

Serve a Spindl ad unit and record the impression

AGENT SKILL

Spindl API pricing

Pricing Plans 1

Published pricing tiers and plan structures.

Spindl Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Spindl Rate Limits

0 limits

RATE LIMITS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Spindl API Rules

64 rules · 59 errors 2 warnings 3 info

SPECTRAL

OpenAPI Overlays 2

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Spindl Ads Api Overlay

5 actions · update · spindl-ads-api-openapi.yml

DERIVED

Spindl Openapi Overlay

4 actions · update · spindl-openapi.yml

DERIVED

Security Posture 2

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

Spindl Authentication

apiKey · 2 schemes

SECURITY

Spindl Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Components

Build 3

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: spindl
name: Spindl
description: Spindl is a Web3 growth platform providing onchain attribution, web3-native analytics, audiences, short links,
  referrals, and ads in one place, helping developers understand where their users come from and how they behave across onchain
  apps. It offers a JavaScript/HTML SDK, Android and iOS SDKs, and a Server-to-Server REST API for campaign and attribution
  management, short (redirect) links, server-side custom event ingestion, and daily data exports. Positioned as Web3's answer
  to Mixpanel and Amplitude, Spindl is used by teams including Uniswap, Base, Safe, and Morpho. A separate publisher-facing
  Ads API on e.spindlembed.com serves targeted onchain ad recommendations and records impressions and clicks, with a React
  BannerEmbed component and a hosted iframe as no-code alternatives. Spindl announced in January 2025 that it was joining
  Coinbase and now operates as a product team inside Base. Originally added to the API Evangelist network as a portfolio-lead
  stub, now enriched from its published developer documentation and live host probes.
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
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
image: https://spindl.xyz/favicon.png
url: https://raw.githubusercontent.com/api-evangelist/spindl/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- multicoin-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-13'
x-docs-platform: nextra
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 8
  pass: local-v1
tags:
- Company
- Web3
- Attribution
- Analytics
- Marketing
- Growth
- SDK
tags_raw:
- Company
- Crypto Web3
- Attribution
- Analytics
- Marketing
- Growth
- SDK
- Web3
apis:
- aid: spindl:spindl-events-api
  name: Spindl Events API
  description: Server-side custom event ingestion for attribution.
  humanURL: https://docs.spindl.xyz/technical/api/custom-events-api
  baseURL: https://api.spindl.xyz/v1
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/spindl-events-api-openapi.yml
  - type: APIReference
    url: https://docs.spindl.xyz/technical/api/custom-events-api
- aid: spindl:spindl-short-links-api
  name: Spindl Short Links API
  description: Redirect links mapping a Spindl link to a destination URL.
  humanURL: https://docs.spindl.xyz/technical/api/short-links
  baseURL: https://api.spindl.xyz/v1
  tags:
  - Short Links
  properties:
  - type: OpenAPI
    url: openapi/spindl-short-links-api-openapi.yml
  - type: APIReference
    url: https://docs.spindl.xyz/technical/api/short-links
- aid: spindl:spindl-ads-api
  name: Spindl Ads API
  description: Publisher-facing onchain advertising API. Fetch targeted ad recommendations for a wallet address at a named
    placement, render the returned unit, and post impressions and clicks back to Spindl. Also serves a hosted iframe ad unit
    for direct embedding. Documented on Spindl's own docs host and backed by Spindl's own @spindl-xyz/embed-react component.
  humanURL: https://docs.spindl.xyz/ads/start-here
  baseURL: https://e.spindlembed.com/v1
  tags:
  - Ads
  - Advertising
  - Onchain
  properties:
  - type: OpenAPI
    url: openapi/spindl-ads-api-openapi.yml
  - type: APIReference
    url: https://docs.spindl.xyz/ads/start-here
  - type: Overlay
    url: overlays/spindl-ads-api-overlay.yaml
  - type: Components
    url: components/spindl-components.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/spindl-openapi-overlay.yaml
- type: DomainSecurity
  url: security/spindl-domain-security.yml
- type: Authentication
  url: authentication/spindl-authentication.yml
- type: Packages
  url: packages/spindl-packages.yml
- type: SDKs
  url: packages/spindl-packages.yml
- type: X-MCPServerCandidate
  url: mcp/spindl-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/spindl-llms.txt
- type: Conventions
  url: conventions/spindl-conventions.yml
- type: ErrorCatalog
  url: errors/spindl-problem-types.yml
- type: Lifecycle
  url: lifecycle/spindl-lifecycle.yml
- type: Conformance
  url: conformance/spindl-conformance.yml
- type: DataModel
  url: data-model/spindl-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Components
  url: components/spindl-components.yml
- type: Plans
  url: plans/spindl-plans-pricing.yml
- type: RateLimits
  url: rate-limits/spindl-rate-limits.yml
- type: Website
  url: https://spindl.xyz
- type: DeveloperPortal
  url: https://docs.spindl.xyz
- type: Documentation
  url: https://docs.spindl.xyz
- type: GettingStarted
  url: https://docs.spindl.xyz/technical/start-here
- type: Blog
  url: https://blog.spindl.xyz
- type: GitHubOrganization
  url: https://github.com/spindl-xyz
- type: SignUp
  url: https://app.spindl.xyz
- type: Support
  url: https://docs.spindl.xyz/contact-spindl
- type: PrivacyPolicy
  url: https://spindl.xyz/privacy-policy

Spindl API — frequently asked questions

Does Spindl have an API?

Yes. APIs.io lists 3 APIs from Spindl, including Spindl Events API, Spindl Short Links API and Spindl Ads API.

Is there an OpenAPI specification for the Spindl API?

Yes. APIs.io indexes 3 OpenAPI specifications for Spindl, each linked for download from this page.

How do I authenticate with the Spindl API?

Spindl uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Spindl Authentication.

Is the Spindl API ready for AI agents?

Spindl has a Kin Score of 29.3 out of 100 (thin) and an Agent Readiness score of 33.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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