NanoTools
44 pay-per-call APIs for AI agents via the x402 protocol. USDC on Base (eip155:8453). No API keys, no signup - pay per call from any x402 client.
For agents
Try free
/api/sha256-free?text=hello - free preview, no payment, 20 req/day per IP.
All tools (45)
- base64 - Base64 encode or decode. ?op=enc|dec&data=... Tolerant to missing padding. ($0.001)
- color-convert - Convert colors between hex, rgb, hsl. ?color=#ff0000 or rgb(255,0,0) ($0.001)
- cron-parse - Explain a cron expression: next 3 run times in UTC. ?expr=*/5 * * * * ($0.001)
- csv2json - Convert CSV to JSON array. ?data=<csv urlencoded>&delim=, ($0.001)
- diff - Unified diff of two texts with changed line count. ?a=<text>&b=<text> ($0.001)
- dns - DNS lookup: A, AAAA, MX, TXT, NS, CNAME records for a domain. ?name=example.com&type=A ($0.001)
- hash-multi - MD5, SHA-1, SHA-256, SHA-512 in one call. ?text=... ($0.001)
- html-entities - Escape or unescape HTML entities. ?op=enc|dec&data=<text> ($0.001)
- json - Validate + pretty-print JSON. ?data={...} (urlencoded). ($0.001)
- jwt-decode - Decode a JWT header and payload WITHOUT signature verification. ?token=<jwt> ($0.001)
- lorem - Lorem ipsum placeholder generator. ?paras=3 or ?words=50 ($0.001)
- markdown2html - Convert Markdown to HTML (tables, fenced code). ?text=<markdown urlencoded> ($0.001)
- password - Secure random password. ?len=16&symbols=1 ($0.001)
- qr - QR code generator. ?data=<text>&size=256 -> PNG as base64 in JSON. ($0.001)
- random - Cryptographically secure random number. ?min=&max= (ints, default 0..100). ($0.001)
- regex - Test a regex against text: matches with groups and positions. ?pattern=<re>&text=<text>&fl ($0.001)
- sha256 - SHA-256 and SHA-512 digests for any text (?text=). Deterministic, local, stable JSON. ($0.001)
- slug - URL slug from any text. ?text=Hello%20World -> hello-world ($0.001)
- text-stats - Text statistics: words, chars, sentences, reading time. ?text=... ($0.001)
- timestamp - Unix timestamp <-> ISO8601 both ways. ?ts=1690000000 or ?iso=2026-01-01T00:00:00Z ($0.001)
- toml2json - Convert TOML to JSON. ?data=<toml urlencoded> ($0.001)
- unit-convert - Convert units: length, weight, volume, data size, temperature. ?value=100&from=cm&to=inch ($0.001)
- urlcode - URL encode/decode. ?op=enc|dec&data=... ($0.001)
- uuid - Generate UUIDv4 (and optional count ?n= up to 100). ($0.001)
- yaml2json - Convert YAML to JSON. ?data=<yaml urlencoded> ($0.001)
- fx-rates - ECB reference currency exchange rates. ?base=USD&symbols=EUR,GBP or ?date=2026-01-15 ($0.002)
- ip-info - IP geolocation and network info: country, city, ASN/org, timezone. ?ip=1.2.3.4 ($0.002)
- rss - Parse any RSS or Atom feed into clean JSON items. ?url=<feed>&limit=10 ($0.002)
- search - Google web search. ?q=query&num=5 returns organic results with title, link, snippet. ($0.002)
- weather - Current weather + 7-day forecast by city name or lat/lon (open-meteo, no key needed). ?cit ($0.002)
- readability - Text readability: Flesch score, level, avg sentence length, keyword density, top words. ?t ($0.003)
- scrape - Fetch a web page and return clean readable text. ?url=https://example.com ($0.003)
- whois - Domain registration data via RDAP: registrar, created/updated/expires, status, nameservers ($0.003)
- robots-audit - Audit robots.txt + sitemap.xml of a site: rules, sitemaps listed, sitemap reachable, URL c ($0.005)
- seo-meta - SEO snapshot of a page: title, description, OG/Twitter meta, h1s, h2 count, canonical, rob ($0.005)
- serp-google - Google SERP: organic results with position, ads count, related searches. ?q=&num=5&gl=us ($0.01)
- serp-yandex - Yandex SERP for RU-market keyword research (region by ?lr=). ?q=&lr=213 ($0.01)
- og-image - Generate an Open Graph image 1200x630 from title/subtitle/theme. ?title=&subtitle=&theme=i ($0.015)
- render-text - Render a JS-heavy page in a real browser and return the visible text. ?url= ($0.015)
- pdf - Render any page to PDF (A4, print background) via headless Chrome. ?url= ($0.02)
- screenshot - Real browser screenshot of any page as PNG (base64), JS rendered. ?url=&width=1280&height= ($0.02)
- trends - Google Trends interest over time for a keyword (weekly points, peak). ?q=casino&geo=US&tim ($0.02)
- trends-region - Google Trends interest by region/country for a keyword. ?q=casino&geo=&time=12-m ($0.02)
- trends-related - Google Trends related queries: top and rising search terms for a keyword. ?q=casino&geo=&t ($0.02)
- seo-report - Full SEO audit report of a domain: health score 0-100, prioritized issues list, title/desc ($0.99)
Payment: requests without payment get HTTP 402 with an x402 PAYMENT-REQUIRED header. Facilitator: facilitator.openx402.ai.