SpyFu

SpyFu is a competitive SEO and PPC intelligence platform that gives marketers and agencies programmatic access to competitor keyword rankings, ad history, backlinks, and domain performance data. The REST API covers eight research domains — Domain Stats, Ad History, PPC Research, SEO Research, Competitors, Kombat, Keyword Research, and Ranking History — and is indexed against 1.6 trillion search results, 8 billion keywords, and 152 million domains.

SpyFu publishes 9 API contracts indexed on the APIs.io network, including Account API, Ad History Research API, Competitors API, and 6 more. Tagged areas include SEO, PPC, Competitive Intelligence, Keyword Research, and Ad History.

The SpyFu catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

SpyFu’s developer surface includes authentication, documentation, engineering blog, pricing, changelog, API reference, support, and 31 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

58.3/100 strong ▬ flat Agent 30/100 agent ready Front door AI 5/6 prominent saas Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

AccessPaid

10 published contracts 1 MCP Servers 6 Agent Skills

SEO PPC Competitive Intelligence Keyword ResearchAd HistoryBacklinksDomain AnalyticsSERP

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Marketing Management

BC-400

Ad History Research APICompetitors APIDomain Stats APIKeyword Research APIKombat APIPPC Research API

GET /v2/ppc/getMostSuccessful GET /v2/ppc/getPaidSerps GET /v2/historic/getHistoricRankingsForDomain GET /v2/seo/getSeoKeywords

Developer Platform & API Ecosystem Management

BC-4270

Account API

GET /v2/usage/month/{usageDate} GET /v2/usage/month/{usageDate}/method

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 58.3/100 · strong

Contract Quality 12.8 / 21

Developer Ergonomics 8.0 / 17

Access Clarity 13.0 / 17

Operational Transparency 5.8 / 11

Contract Governance 2.9 / 10

Discoverability 6.0 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 30/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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 0 / 5

Distinct Operations 3 / 3

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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):

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
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)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 47.0 — up to +10.6 composite points
Contract Quality scores 60.2 — up to +10.0 composite points
Contract Governance scores 28.0 — up to +8.6 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/spyfu/apis.yml: open an issue on github.com/api-evangelist/spyfu 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 →

APIs 9

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

SpyFu Account API

The Account API API from SpyFu — 3 operation(s) for account api.

SpyFu Ad History Research API

The Ad History Research API API from SpyFu — 3 operation(s) for ad history research api.

SpyFu Competitors API

The Competitors API API from SpyFu — 3 operation(s) for competitors api.

SpyFu Domain Stats API

The Domain Stats API API from SpyFu — 6 operation(s) for domain stats api.

SpyFu Keyword Research API

The Keyword Research API API from SpyFu — 7 operation(s) for keyword research api.

SpyFu Kombat API

The Kombat API API from SpyFu — 2 operation(s) for kombat api.

SpyFu PPC Research API

The PPC Research API API from SpyFu — 3 operation(s) for ppc research api.

SpyFu Ranking History API

The Ranking History API API from SpyFu — 3 operation(s) for ranking history api.

SpyFu SEO Research API

The SEO Research API API from SpyFu — 17 operation(s) for seo research api.

OPEN COLLECTION

Scroll for all 9

MCP Servers 1

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

SpyFu MCP Server

SpyFu serves a remote Model Context Protocol endpoint from its own developer portal host at https://developer.spyfu.com/mcp. A GET returns HTTP 200 with the plain-text body "Thi...

Spyfu Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Spyfu Rate Limits

9 limits

RATE LIMITS

FinOps 1

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

Spyfu Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Spyfu Context

0 classes · 23 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

SpyFu — jsonschema rules

5 rules · 3 warnings 2 info

SPECTRAL

OpenAPI Overlays 9

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.

Spyfu Account Api Api Overlay

0 properties

JSON SCHEMA

Scroll for all 10

Examples 9

Example request and response payloads for these APIs.

Spyfu Ad History Examples

1 fields

EXAMPLE

Spyfu Competitors Examples

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Spyfu Agentic Access

48 operations · 1 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

WellKnown

MCPServer

AgentSkill

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Vocabulary

Rules

JSONLD

Scroll for all 8

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

ToolCrosswalk

ToolCrosswalk

Packages

Packages

GitHubOrganization

GitHubOrganization

SourceCode

SourceCode

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 4

Status, limits, changes, and where to get help

RateLimits

ChangeLog

ChangeLog

Support

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: spyfu
name: SpyFu
description: SpyFu is a competitive SEO and PPC intelligence platform that gives marketers and agencies programmatic access
  to competitor keyword rankings, ad history, backlinks, and domain performance data. The REST API covers eight research domains
  — Domain Stats, Ad History, PPC Research, SEO Research, Competitors, Kombat, Keyword Research, and Ranking History — and
  is indexed against 1.6 trillion search results, 8 billion keywords, and 152 million domains.
type: Index
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - spyfu/spyfu_api_docs
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/spyfu.png
url: https://raw.githubusercontent.com/api-evangelist/spyfu/refs/heads/main/apis.yml
created: 2026-06-13
modified: '2026-09-16'
specificationVersion: '0.23'
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-17
tags:
- SEO
- PPC
- Competitive Intelligence
- Keyword Research
- Ad History
- Backlinks
- Domain Analytics
- SERP
apis:
- aid: spyfu:spyfu-account-api-api
  name: SpyFu Account API
  description: The Account API API from SpyFu — 3 operation(s) for account api.
  humanURL: https://developer.spyfu.com/
  baseURL: https://api.spyfu.com
  tags:
  - Account API
  properties:
  - type: OpenAPI
    url: openapi/spyfu-account-api-api-openapi.yml
  - type: Documentation
    url: https://developer.spyfu.com/docs
  - type: APIReference
    url: https://developer.spyfu.com/reference
  - type: JSONSchema
    url: json-schema/spyfu-account-schema.json
  - type: Overlay
    url: overlays/spyfu-account-api-api-overlay.yaml
- aid: spyfu:spyfu-ad-history-research-api-api
  name: SpyFu Ad History Research API
  description: The Ad History Research API API from SpyFu — 3 operation(s) for ad history research api.
  humanURL: https://developer.spyfu.com/
  baseURL: https://api.spyfu.com
  tags:
  - Ad History Research API
  properties:
  - type: OpenAPI
    url: openapi/spyfu-ad-history-research-api-api-openapi.yml
  - type: Documentation
    url: https://developer.spyfu.com/docs
  - type: APIReference
    url: https://developer.spyfu.com/reference
  - type: Examples
    url: examples/spyfu-ad-history-examples.json
  - type: JSONSchema
    url: json-schema/spyfu-ad-history-schema.json
  - type: Overlay
    url: overlays/spyfu-ad-history-research-api-api-overlay.yaml
- aid: spyfu:spyfu-competitors-api-api
  name: SpyFu Competitors API
  description: The Competitors API API from SpyFu — 3 operation(s) for competitors api.
  humanURL: https://developer.spyfu.com/
  baseURL: https://api.spyfu.com
  tags:
  - Competitors API
  properties:
  - type: OpenAPI
    url: openapi/spyfu-competitors-api-api-openapi.yml
  - type: Documentation
    url: https://developer.spyfu.com/docs
  - type: APIReference
    url: https://developer.spyfu.com/reference
  - type: Examples
    url: examples/spyfu-competitors-examples.json
  - type: JSONSchema
    url: json-schema/spyfu-competitors-schema.json
  - type: Overlay
    url: overlays/spyfu-competitors-api-api-overlay.yaml
- aid: spyfu:spyfu-domain-stats-api-api
  name: SpyFu Domain Stats API
  description: The Domain Stats API API from SpyFu — 6 operation(s) for domain stats api.
  humanURL: https://developer.spyfu.com/
  baseURL: https://api.spyfu.com
  tags:
  - Domain Stats API
  properties:
  - type: OpenAPI
    url: openapi/spyfu-domain-stats-api-api-openapi.yml
  - type: Documentation
    url: https://developer.spyfu.com/docs
  - type: APIReference
    url: https://developer.spyfu.com/reference
  - type: Examples
    url: examples/spyfu-domain-stats-examples.json
  - type: JSONSchema
    url: json-schema/spyfu-domain-stats-schema.json
  - type: Overlay
    url: overlays/spyfu-domain-stats-api-api-overlay.yaml
- aid: spyfu:spyfu-keyword-research-api-api
  name: SpyFu Keyword Research API
  description: The Keyword Research API API from SpyFu — 7 operation(s) for keyword research api.
  humanURL: https://developer.spyfu.com/
  baseURL: https://api.spyfu.com
  tags:
  - Keyword Research API
  properties:
  - type: OpenAPI
    url: openapi/spyfu-keyword-research-api-api-openapi.yml
  - type: Documentation
    url: https://developer.spyfu.com/docs
  - type: APIReference
    url: https://developer.spyfu.com/reference
  - type: Examples
    url: examples/spyfu-keyword-related-examples.json
  - type: JSONSchema
    url: json-schema/spyfu-keyword-related-schema.json
  - type: Overlay
    url: overlays/spyfu-keyword-research-api-api-overlay.yaml
- aid: spyfu:spyfu-kombat-api-api
  name: SpyFu Kombat API
  description: The Kombat API API from SpyFu — 2 operation(s) for kombat api.
  humanURL: https://developer.spyfu.com/
  baseURL: https://api.spyfu.com
  tags:
  - Kombat API
  properties:
  - type: OpenAPI
    url: openapi/spyfu-kombat-api-api-openapi.yml
  - type: Documentation
    url: https://developer.spyfu.com/docs
  - type: APIReference
    url: https://developer.spyfu.com/reference
  - type: Examples
    url: examples/spyfu-kombat-examples.json
  - type: JSONSchema
    url: json-schema/spyfu-kombat-schema.json
  - type: Overlay
    url: overlays/spyfu-kombat-api-api-overlay.yaml
- aid: spyfu:spyfu-ppc-research-api-api
  name: SpyFu PPC Research API
  description: The PPC Research API API from SpyFu — 3 operation(s) for ppc research api.
  humanURL: https://developer.spyfu.com/
  baseURL: https://api.spyfu.com
  tags:
  - PPC Research API
  properties:
  - type: OpenAPI
    url: openapi/spyfu-ppc-research-api-api-openapi.yml
  - type: Documentation
    url: https://developer.spyfu.com/docs
  - type: APIReference
    url: https://developer.spyfu.com/reference
  - type: Examples
    url: examples/spyfu-ppc-research-serp-examples.json
  - type: JSONSchema
    url: json-schema/spyfu-ppc-research-serp-schema.json
  - type: Overlay
    url: overlays/spyfu-ppc-research-api-api-overlay.yaml
- aid: spyfu:spyfu-ranking-history-api-api
  name: SpyFu Ranking History API
  description: The Ranking History API API from SpyFu — 3 operation(s) for ranking history api.
  humanURL: https://developer.spyfu.com/
  baseURL: https://api.spyfu.com
  tags:
  - Ranking History API
  properties:
  - type: OpenAPI
    url: openapi/spyfu-ranking-history-api-api-openapi.yml
  - type: Documentation
    url: https://developer.spyfu.com/docs
  - type: APIReference
    url: https://developer.spyfu.com/reference
  - type: Examples
    url: examples/spyfu-ranking-history-examples.json
  - type: JSONSchema
    url: json-schema/spyfu-ranking-history-schema.json
  - type: Overlay
    url: overlays/spyfu-ranking-history-api-api-overlay.yaml
- aid: spyfu:spyfu-seo-research-api-api
  name: SpyFu SEO Research API
  description: The SEO Research API API from SpyFu — 17 operation(s) for seo research api.
  humanURL: https://developer.spyfu.com/
  baseURL: https://api.spyfu.com
  tags:
  - SEO Research API
  properties:
  - type: OpenAPI
    url: openapi/spyfu-seo-research-api-api-openapi.yml
  - type: Documentation
    url: https://developer.spyfu.com/docs
  - type: APIReference
    url: https://developer.spyfu.com/reference
  - type: Examples
    url: examples/spyfu-seo-research-serp-examples.json
  - type: JSONSchema
    url: json-schema/spyfu-seo-research-serp-schema.json
  - type: Overlay
    url: overlays/spyfu-seo-research-api-api-overlay.yaml
common:
- type: CapabilityMap
  url: capabilities/spyfu-capability-edges.yml
  name: SpyFu Business Capability Map
- type: AgenticAccess
  url: agentic-access/spyfu-agentic-access.yml
- type: DomainSecurity
  url: security/spyfu-domain-security.yml
- type: Authentication
  url: authentication/spyfu-authentication.yml
- type: Website
  url: https://www.spyfu.com/
- type: Documentation
  url: https://developer.spyfu.com/
- type: GitHubOrg
  url: https://github.com/spyfu
- type: LinkedIn
  url: https://www.linkedin.com/company/spyfu
- type: X
  url: https://x.com/spyfu
- type: Blog
  url: https://www.spyfu.com/blog/
- type: Pricing
  url: https://www.spyfu.com/pricing
- type: Plans
  url: plans/spyfu-plans-pricing.yml
- type: RateLimits
  url: rate-limits/spyfu-rate-limits.yml
- type: FinOps
  url: finops/spyfu-finops.yml
- type: LLMsTxt
  url: llms/spyfu-llms.txt
- type: WellKnown
  url: well-known/spyfu-well-known.yml
- type: MCPServer
  url: mcp/spyfu-mcp.yml
- type: ToolCrosswalk
  url: mcp/spyfu-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Packages
  url: packages/spyfu-packages.yml
- type: Conventions
  url: conventions/spyfu-conventions.yml
- type: ErrorCatalog
  url: errors/spyfu-problem-types.yml
- type: Lifecycle
  url: lifecycle/spyfu-lifecycle.yml
- type: Conformance
  url: conformance/spyfu-conformance.yml
- type: DataModel
  url: data-model/spyfu-data-model.yml
- type: ChangeLog
  url: changelog/spyfu-changelog.yml
- type: Vocabulary
  url: vocabulary/spyfu-vocabulary.yml
- type: Rules
  url: rules/spyfu-jsonschema-spectral-rules.yml
- type: JSONLD
  url: json-ld/spyfu-context.jsonld
- type: DeveloperPortal
  url: https://developer.spyfu.com/
- type: APIReference
  url: https://developer.spyfu.com/reference
- type: ChangeLog
  url: https://help.spyfu.com/en/articles/5640863-what-s-new-on-spyfu
- type: Support
  url: https://help.spyfu.com/en/
- type: TermsOfService
  url: https://www.spyfu.com/termsconditions
- type: PrivacyPolicy
  url: https://www.spyfu.com/privacypolicy
- type: Login
  url: https://www.spyfu.com/login
- type: GitHubOrganization
  url: https://github.com/spyfu
- type: SourceCode
  url: https://github.com/spyfu/spyfu_api_docs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 28
  pass: local-v1

SpyFu API — frequently asked questions

Does SpyFu have an API?

Yes. APIs.io lists 9 APIs from SpyFu, including SpyFu Account API, SpyFu Ad History Research API and SpyFu Competitors API, and 6 more.

Is there an OpenAPI specification for the SpyFu API?

Yes. APIs.io indexes 9 OpenAPI specifications for SpyFu, each linked for download from this page.

How do I authenticate with the SpyFu API?

SpyFu uses bearer-token authentication (apiKey/http · 3 schemes). The details are profiled on APIs.io as Spyfu Authentication.

How much does the SpyFu API cost?

APIs.io lists 6 pricing plans for SpyFu, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does SpyFu have an MCP server?

Yes. APIs.io lists 1 MCP server for SpyFu: SpyFu serves a remote Model Context Protocol endpoint from its own developer portal host at https://developer.spyfu.com/mcp. A GET returns HTTP 200 with the plain-text body "This URL can only be acces

Is the SpyFu API ready for AI agents?

SpyFu has a Kin Score of 58.3 out of 100 (strong) and an Agent Readiness score of 30.3 (agent-ready), scored by API Evangelist on 2026-10-31.

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