Web search APIs for AI agents
Web search APIs let an agent ask the live web, or another named search endpoint, and get titles, links or structured results back in one paid call. A listing in Data, Tools or Intelligence is included when its name contains the word search, or when its text names web search, a SERP, a search engine or a search API. That is a deliberate rule, so a postcode lookup that merely says it can search a table stays off the page, while an endpoint that puts search in its name stays on it. Discovery is free. The call itself is paid to the provider over x402, in USDC on Base, Solana or Algorand, with no API key. Settlement-verified means a paid route with an on-chain receipt. Examples are claimed, verified listings. Unclaimed (bazaar) imports are labelled and are not the examples. Listing is free and the provider keeps 100% of each settled call. Counts are the live size of this rule, not a saved snapshot and not a guess about how often anyone searches.
42 APIs and 118 endpoints match this page. 42 are settlement-verified: a paid route with an on-chain receipt.
Settlement-verified examples
- Bankruptcy Filing Search & Chapter 11 Dockets API · $0.01 · settlement-verified · On-chain receipt
Search CourtListener RECAP bankruptcy dockets by chapter, debtor or case keyword, court, docket number, and filing date for restructuring leads, insolvency monitoring, legal research, and credit-risk review. Deterministic test: chapter=11&maxResults=1. RECAP is an incomplete PACER-derived archive, not an official or complete PACER search. Docket metadata and party names do not prove identity, debt validity, liability, discharge, current status, case outcome, creditworthiness, or legal effect. MCP tool: search_bankruptcy_filings. - New Jersey UCC Lien Search & Debtor Filings API · $0.01 · settlement-verified · On-chain receipt
Search New Jersey UCC debtor filings by organization, person, or filing number for lender due diligence, credit underwriting, vendor risk, and business lien checks. Deterministic test: debtorName=JPMorgan&maxResults=1. Results are point-in-time non-certified portal evidence—not identity resolution, lien priority, legal effect, expiry, or proof of complete debtor coverage. - Causal Web Search · $0.02 · settlement-verified · On-chain receipt
Live web search for AI agents. Returns structured JSON with normalized - Eleeth x402 · $0.01 · settlement-verified · On-chain receipt
53 AI endpoints on Base — chat, image, video, TTS, podcast, screenshot, web search and more. Pay per call in USDC via x402, no API key, no account. - Kepler Ops Tools · $0.001 to $0.01 · settlement-verified · On-chain receipt
Pay-per-call utility tools for agents: hashing, HMAC, base64 encode/decode, JWT decode, live crypto prices, web fetch and web search. USDC via x402 on Base and Solana. - Macaroon Cyber Vulnerability Risk Search · $0.003 · settlement-verified · On-chain receipt
Look up a CVE and get a consolidated risk record: the NVD summary, CVSS severity with score, version and full vector, exploited-in-the-wild status drawn from the CISA KEV catalogue including the date added and known ransomware use, publication and modification dates, and per source provenance with licence terms. POST /execute/cyber-vulnerability-risk-search-v1 costs $0.003 USDC per call on Base, no API key. Query with a bare CVE identifier such as CVE-2017-0144. The natural language phrasing shown in the provider's own bazaar example returned zero results on two separate paid attempts, so send the identifier on its own. Sources are queried per request rather than served from a stored snapshot. Metadata and evidence summary only: this does not scan your systems and is not security advice. - Macaroon grant and tender search · $0.005 · settlement-verified · On-chain receipt
Search public procurement and grant opportunities in one call across UK Contracts Finder, UK Find a Tender, EU TED and US Grants.gov. POST /execute/grant-tender-opportunity-search-v1 returns source-linked metadata only: title, buyer or funder, publication date, deadline, status, region and category codes, a link to the original notice and a per-row content hash. $0.005 USDC per call on Base, no API key. Coverage is per query and is not guaranteed: a source appears in the results only when that source has a live match for your query, so one call may return rows from a single source and another may span several. Do not read a result as covering all four sources on every call. Metadata only: no tender documents, specifications or application forms are reproduced. Verify the deadline, eligibility and open or closed status against the original notice before acting. - Macaroon research paper search · $0.001 · settlement-verified · On-chain receipt
Source-linked scientific paper metadata by topic. POST /execute/polymathica-research-paper-search-v1 returns records with title, DOI, source URL, licence state and provenance, plus a falsifiable acceptance predicate on the response. $0.001 USDC per call on Base, no API key. Scope, verified by a paid call: this is a small pre-indexed corpus, not a live Crossref search. The endpoint reports no_outbound_network_on_purchase true and a retrieval_date of 2026-08-14, so results are served from a static index built on that date. Our paid call for "CRISPR base editing" returned 2 records, and both were the same SSRN preprint pair, against the 398,541 works Crossref lists for that query. Metadata only: no paper text and no reuse rights are supplied. - ONE Engine · $0.0009 to $0.008 · settlement-verified · On-chain receipt
Low-cost x402 pay-per-call APIs for AI agents: web search, email checks, web extraction, SHA hashing and blob decoding on Base/USDC. - PennyAPI Local Business & Places Search · $0.004 · settlement-verified · On-chain receipt
Real-time local business and places search for AI agents. Find restaurants, stores, services, and nearby businesses with structured addresses, coordinates, ratings, phone numbers, and websites. - Web Search & Data API — SERP, page reader & scrapers · $0.005 to $0.15 · settlement-verified · On-chain receipt
Pay-per-call web search and web data for AI agents: multi-engine SERP, search-and-read, URL-to-markdown scraping, Google Trends, WHOIS/DNS, enrichment, SEC filings, geocoding and academic search.
Unclaimed (bazaar) imports
These rows were imported and the provider has not claimed them. They are not the examples above.
- Amazon product search API - search Amazon products / find products on Amazon by… · $0.006 · settlement-verified · Unclaimed (bazaar)
Amazon product search API - search Amazon products / find products on Amazon by keyword (US). Amazon product search API - search Amazon products / find products on Amazon by keyword (US). Live Amazon product data: ranked listings with ASIN, title, product URL, image, price range, currency, star rating, review count and Amazon's Choice / Best Seller flags. No matches returns empty results. - Current web search results with titles, URLs, snippets, and source engine… · $0.01 · settlement-verified · Unclaimed (bazaar)
Current web search results with titles, URLs, snippets, and source engine metadata. Current web search results with titles, URLs, snippets, and source engine metadata. - CVE lookup and vulnerability search — resolve a CVE ID via OSV and return… · $0.01 · settlement-verified · Unclaimed (bazaar)
CVE lookup and vulnerability search — resolve a CVE ID via OSV and return summary, severity, affected packages, and references for agent triage. CVE lookup and vulnerability search — resolve a CVE ID via OSV and return summary, severity, affected packages, and references for agent triage. - DataForAgents — Steam catalog search for agents (name, genre, price filters) · $0.01 · settlement-verified · Unclaimed (bazaar)
DataForAgents — Steam catalog search for agents (name, genre, price filters) - eBay listings search — live prices, condition, shipping, seller reputation,… · $0.02 · settlement-verified · Unclaimed (bazaar)
eBay listings search — live prices, condition, shipping, seller reputation, auctions & Buy It Now across supported regional eBay sites, with category, price band, condition, seller & location filters, sorted, as clean JSON. eBay listings search — live prices, condition, shipping, seller reputation, auctions & Buy It Now across supported regional eBay sites, with category, price band, condition, seller & location filters, sorted, as clean JSON. - Exa /search endpoint · $0.007 · settlement-verified · Unclaimed (bazaar)
Exa /search endpoint - Exa Search - Neural search across the web · $0.01 · settlement-verified · Unclaimed (bazaar)
Exa Search - Neural search across the web - Facebook Ad Library search by keyword — every live and recent ad matching a… · $0.03 · settlement-verified · Unclaimed (bazaar)
Facebook Ad Library search by keyword — every live and recent ad matching a search term across all advertisers on Facebook, Instagram, Messenger and Threads. Facebook Ad Library search by keyword — every live and recent ad matching a search term across all advertisers on Facebook, Instagram, Messenger and Threads. Returns the full ad creative (headline, body copy, CTA button + destination link, image and video URLs), the advertiser, run dates and days-running, and platform mix. Commercial and political ads, no Meta API or login. Competitor ad intelligence, ad spy, and creative research for AI agents. - Full-text search across every aggregated data source in one call: news, SEC… · $0.01 · settlement-verified · Unclaimed (bazaar)
Full-text search across every aggregated data source in one call: news, SEC filings, court opinions, academic papers, government records, and developer discussions. Full-text search across every aggregated data source in one call: news, SEC filings, court opinions, academic papers, government records, and developer discussions. One query surfaces everything concordant across independently-sourced, citable results -- not a single-source wrapper. Optional source/category/since filters. - General web search reselling the Tavily Search API: query the live web and get… · $0.01 · settlement-verified · Unclaimed (bazaar)
General web search reselling the Tavily Search API: query the live web and get back ranked results (title, URL, snippet, relevance score) plus an optional short synthesized answer, with basic or advanced search depth and optional domain include/exclude filters. General web search reselling the Tavily Search API: query the live web and get back ranked results (title, URL, snippet, relevance score) plus an optional short synthesized answer, with basic or advanced search depth and optional domain include/exclude filters. - Google Business Profile and Google Maps local business search API: find… · $0.03 · settlement-verified · Unclaimed (bazaar)
Google Business Profile and Google Maps local business search API: find businesses within a radius of a coordinate, filtered by category and/or name. Google Business Profile and Google Maps local business search API: find businesses within a radius of a coordinate, filtered by category and/or name. Returns ranked businesses with name, category, star rating and review count, address, phone, website domain, place_id/CID and coordinates. For local SEO, lead lists and competitor research. No match → empty results. - Google Trends interest over time for a keyword — monthly search popularity si... · $0.05 · settlement-verified · Unclaimed (bazaar)
Google Trends interest over time for a keyword — monthly search popularity since 2004, worldwide or for one country (geo), with ready-to-call links to the other Google Trends routes. For keyword research, SEO and demand trend analysis.
Related pages
Questions
How does a listing get onto the web search page?
It is in Data, Tools or Intelligence, and either its name contains the word search or its name, description or tags contain a phrase such as web search, SERP, search engine or search API. Tags named search, serp or web-search also match.
Can an agent pay for search without an account?
Yes. It pays the provider per call over x402 in USDC on Base, Solana or Algorand. No API key and no buyer account are required. The MCP catalogue at payapi.market/mcp does not charge for search_apis, list_apis or get_api.
Are the example search APIs settlement-verified?
The examples are. Settlement-verified means a paid route with an on-chain receipt. The link on each example is that receipt. Unclaimed (bazaar) imports are listed separately and are not examples.