Pay-per-call keyword research via SpyFu's related-keywords API on Tempo L2.
What it does
This MPP endpoint exposes SpyFu's Related Keywords API (v2) through the Tempo payment protocol. It returns related keyword data for a given keyword, drawing on SpyFu's extensive database of SEO rankings, PPC ads, ad history, and domain analytics spanning 18+ years of historical search data.
The endpoint is live and responds with a standard MPP 402 payment challenge. Settlement occurs on Tempo L2 (chainId 4217) using pathUSD. Each call costs 20,000 base units; assuming pathUSD uses 6 decimals, that equates to $0.02 per request. The provider covers transaction fees (feePayer: true), so the caller only pays the stated amount. The wildcard path pattern (`/apis/keyword_api/v2/related/*`) suggests the keyword is passed as a path segment.
Documentation is sparse — the provider's origin returns 404 on all standard doc paths (/docs, /api, /pricing, /README). No OpenAPI schema or usage examples were found. The endpoint description and the broader SpyFu product context indicate it returns related keywords, but the exact response schema, query parameters, and rate limits are unknown. Users should expect a JSON response with keyword suggestions, search volume, CPC, and competition metrics typical of SpyFu's keyword tools, but this is inferred from the parent product rather than confirmed by endpoint documentation.
Capabilities
Use cases
- —Finding related keywords for SEO content planning
- —Discovering PPC keyword opportunities for ad campaigns
- —Enriching keyword lists with related terms and metrics
- —Automated keyword research pipelines for marketing agents
Fit
Best for
- —AI agents needing on-demand keyword research without a SpyFu subscription
- —Programmatic SEO workflows that need related keyword data per-query
- —Developers building keyword suggestion features into tools
Not for
- —Bulk keyword exports requiring thousands of lookups (cost adds up at $0.02/call)
- —Users needing full SpyFu domain analytics or backlink data (this is keyword-specific only)
- —Non-programmatic users who would be better served by SpyFu's web UI
Quick start
curl -X GET "https://spyfu.mpp.tempo.xyz/apis/keyword_api/v2/related/seo+tools" \
-H "Authorization: Payment <tempo-payment-token>"Endpoint
Quality
The endpoint is live with a valid MPP 402 challenge and clear pricing, but there is no documentation, no OpenAPI schema, and no response examples. The response format and accepted parameters are entirely inferred from the SpyFu product context.
Warnings
- —No documentation found — all standard doc paths return 404.
- —No OpenAPI or response schema available; response format is unknown.
- —Currency address 0x20c000000000000000000000b9537d11c60e8b50 assumed to be pathUSD with 6 decimals; if decimals differ, the actual price changes.
- —Exact query parameters and path conventions are undocumented; the wildcard pattern is inferred.
Citations
- —SpyFu offers competitor keyword research with 18+ years of historical data covering SEO rankings, PPC ads, ad history, and domain analytics.https://spyfu.mpp.tempo.xyz
- —Endpoint returns HTTP 402 with MPP challenge, method=tempo, intent=charge, amount=20000, chainId=4217, feePayer=true.https://spyfu.mpp.tempo.xyz/apis/keyword_api/v2/related/*