Developers are tired of wiring a new search API every month, and multi-provider SDKs now fall back to the next provider on rate limits (429), timeouts or outages. FastAF fits well as a fallback because it needs **no account or API key** when paid with x402, so a backup never fails on a missing signup. ## What FastAF adds to a chain Route What you get Price `/x402/v1/serp` Google organic results (`query`, optional `results` 1–100, zero-based `page`) $0.003 `/x402/v1/search` Alias of `/x402/v1/serp` (same Google results) $0.003 `/x402/v1/bing` Bing web results $0.005 `/x402/v1/news` Google News $0.005 Source: [https://api.fastaf.co/openapi.json](https://api.fastaf.co/openapi.json) (28 Oct 2026). Documented responses include 429, 502 and 503 (a source timeout or outage is a 503 with `Retry-After: 5`, `error.code` set to `upstream_timeout` or `upstream_unavailable`, `error.stage: "upstream_fetch"` and `error.retry_after: 5`), so your chain can classify FastAF’s own failures the same way. ## Measured: the 402 handshake From one test machine on 28 Oct 2026 (02:22 UTC), 15 unpaid requests to serp, scrape and bing returned HTTP 402 with a time-to-first-byte between **61 ms and 129 ms**. This is only the price quote step, not a full paid search; we do not publish end-to-end latency numbers we have not verified. ## Example (generic fallback) ``` async function search(q: string) { for (const provider of [primary, fastaf]) { try { return await provider(q); } catch (e: any) { if (![429, 503, 504].includes(e.status)) throw e; } } } async function fastaf(q: string) { const url = "https://api.fastaf.co/x402/v1/serp?query=" + encodeURIComponent(q); return payWithX402(url); // your x402 client; settled only if the request succeeds } ``` Without a wallet: 500 free credits every month after email verification at [https://fastaf.co/signup/](https://fastaf.co/signup/). Related: [Google SERP API](/apis/google-serp-api/) · [Detect poisoned SERP results](/how-to/detect-poisoned-incomplete-serp-results/) · [Cap retries in agent loops](/how-to/agent-tool-retry-cost/) ## Reference * [Google SERP API](/apis/google-serp-api/): every parameter and response field * [Docs](/docs/): authentication, errors, MCP and [x402](/docs/#x402) * [Pricing](/pricing/): credit packs from $10, without expiry ## Blog posts on Google SERP API * [How to scrape Google search results in Python](/blog/scrape-google-search-python/) * [What a SERP API actually costs per 1,000 searches](/blog/serp-api-cost-per-1000-searches/) * [Giving an LLM fresh web data: SERP APIs for RAG and grounding](/blog/serp-api-for-rag-llm-grounding/) * [Web search for AI agents after Bing: what options are left in 2026?](/blog/web-search-api-for-ai-agents-after-bing/) * [How an AI agent pays for a web search per call with x402](/blog/ai-agent-pay-per-call-x402/) * [LangChain’s Google search tool after Custom Search shuts down](/blog/langchain-google-search-tool-custom-search-shutdown/) * [Built-in LLM web search vs a SERP API: cost per answer](/blog/llm-web-search-tool-cost-vs-serp-api/) * [Track Google AI Overviews in Python: presence, sources, changes](/blog/track-google-ai-overviews-python/) * [n8n web scraping and Google search: a workflow without code](/blog/n8n-google-search-results-workflow/) * [How to get Google search results as JSON (no HTML parsing)](/blog/google-results-json-without-parsing/) * [Google Search results as reliable structured data: what breaks DIY scraping](/blog/scrape-google-search-without-getting-blocked/) * [How to monitor keyword rankings with Python](/blog/how-to-monitor-keyword-rankings-python/) * [Google's official Search API vs SERP APIs: what are your options in 2026?](/blog/google-search-api-alternatives/) * [Free SERP API tiers compared (2026)](/blog/free-serp-api-tiers-compared/) * [Give an AI agent live web search with a hard spending cap](/blog/ai-agent-web-search-spending-cap/) ## Other sources * [How to read public Amazon data when your requests fail](/how-to/read-amazon-data/) * [How to read public Google Search data when your requests fail](/how-to/read-google-data/) * [How to read public Walmart data when your requests fail](/how-to/read-walmart-data/) * [How to read LinkedIn data with an API](/how-to/read-linkedin-data/) * [How to read public eBay data when your requests fail](/how-to/read-ebay-data/) * [How to read public Booking.com data when your requests fail](/how-to/read-booking-data/) * [How to read X profile data with an API](/how-to/read-x-data/) * [How to read public Zillow data when your requests fail](/how-to/read-zillow-data/) * [Pay-per-call web scraping for AI agents with x402](/how-to/x402-pay-per-call-web-scraping/) * [MCP servers for Amazon, SERP and web scraping](/how-to/best-mcp-servers-amazon-serp-scraping/) * [Cost per agent: monthly SaaS vs x402 pay-per-call](/how-to/cost-per-agent-saas-vs-x402/) * [How FastAF handles heavy pages and timeouts](/how-to/heavy-pages-timeouts/) * [x402 endpoint discovery checklist: how agents find a paid API (and how FastAF passes it)](/how-to/x402-discovery-checklist/) * [Add FastAF to Claude Code, Codex and Cursor](/how-to/add-fastaf-claude-code-codex-cursor/) * [How to detect poisoned or incomplete SERP results in AI agents](/how-to/detect-poisoned-incomplete-serp-results/) * [Cap agent spend per call with fixed x402 prices](/how-to/agent-spend-caps-per-call-pricing/) * [Use FastAF from the Cloudflare Agents SDK](/how-to/fastaf-cloudflare-agents-sdk/) * [Budget a scraping job before you run it](/how-to/budget-scraping-job-fixed-prices/) * [Try FastAF for free, no card](/how-to/free-search-api-for-agents/) * [Too many MCP tools? Keep agent context small](/how-to/mcp-tool-schema-bloat/) * [How agents find an API (and where FastAF is)](/how-to/agent-discovery-files/) * [Why agent retries cost more than you think](/how-to/agent-tool-retry-cost/) * [All how-to guides](/how-to/) ## Compare * [FastAF vs SerpApi](/compare/serpapi/) * [FastAF vs Exa](/compare/exa/) * [FastAF vs Tavily](/compare/tavily/) * [FastAF vs Firecrawl](/compare/firecrawl/) * [FastAF vs Apify](/compare/apify/) * [FastAF vs toll402](/compare/toll402/) * [FastAF vs serp402](/compare/serp402/) * [FastAF vs AgentBIT](/compare/agentbit/) * [FastAF vs Amazon PA-API](/compare/amazon-pa-api/) * [FastAF vs Serper](/compare/serper/) * [FastAF vs ScrapingBee](/compare/scrapingbee/) * [FastAF vs ScraperAPI](/vs/scraperapi/) * [FastAF vs Bright Data](/vs/bright-data/) * [Benchmarks](/benchmarks/): latency and cost per 1,000 requests, measured ## Try it on your own request 500 free credits every month after email verification, no card. [Start free](/signup/)[Google SERP API](/apis/google-serp-api/) ## Related * [Google SERP API](/apis/google-serp-api/) * [How to read public Amazon data when your requests fail](/how-to/read-amazon-data/) * [How to read public Google Search data when your requests fail](/how-to/read-google-data/)