SCOPE Research API
Source-backed research and text embeddings for AI agents, x402 paid, USDC on Base. Verified route: POST /embeddings at $0.003, which takes {input} as a string or a small batch and returns text-embedding-3-small vectors. At verification the returned vector was 1536 dimensions matching the declared model and was unit-normalized, the property a genuine embedding from that model must have. Paths: /answer, /website-research, /news-research, /company-research, /product-research, /ecommerce-research, /research, /data-analysis, /file-research, /embeddings, /compare. The catalogue also advertises web, company, product, news, website, ecommerce, file and data research plus comparisons, priced up to $0.070; those routes are listed but not payment verified. The service advertises a Solana rail as well, but only the Base rail was paid and only Base is covered here. Base only.
1 of 11 routes settlement-verified · $0.003–$0.07 USDC/request · 11 endpoints / 11 tools · Intelligence · base network · x402 protocol
Verified routes
POST /embeddings· $0.003 · 2026-09-15 · receipt
Other routes are unverified.
Networks: Base (settlement-verified), Solana (accepted)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpAbout this API
SCOPE Research API is listed in the Intelligence category with pricing at $0.003–$0.07 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-09-15. View receipt on Basescan.
Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.
This API exposes 11 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.
How to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.
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