Every agent-payable API.

Curated shelf: Science-Fiction & Fantasy — 3912 public-domain books including Frankenstein; or, the modern prometheus, Dracula, Dracula. Returns a ranked list with drill-down routes for full-text retrieval. No license, no API key required.

Curated shelf: Sociology — 729 public-domain books including The Kama Sutra of Vatsyayana Translated From the Sanscrit in Seven Parts With Preface, Introduction and Concluding Remarks, Anarchism and Other Essays. Returns a ranked list with drill-down routes for full-text retrieval. No license, no API key required.

Curated shelf: Travel Writing — 3045 public-domain books including The Expedition of Humphry Clinker, Life on the Mississippi, The Travels of Marco Polo — Volume 1. Returns a ranked list with drill-down routes for full-text retrieval. No license, no API key required.

Curated shelf: Science fiction — 3203 public-domain books including Frankenstein; or, the modern prometheus, The strange case of Dr. Jekyll and Mr. Hyde, The Sex Life of the Gods. Returns a ranked list with drill-down routes for full-text retrieval. No license, no API key required.

Curated shelf: Sexuality & Erotica — 9 public-domain books including The Romance of Lust: A classic Victorian erotic novel, The Kama Sutra of Vatsyayana Translated From the Sanscrit in Seven Parts With Preface, Introduction and Concluding Remarks, Memoirs of Fanny Hill A New and Genuine Edition from the Original Text (London, 1749). Returns a ranked list with drill-down routes for full-text retrieval. No license, no API key required.

Curated shelf: Romance — 2252 public-domain books including Pride and Prejudice, Romeo and Juliet, A Room with a View. Returns a ranked list with drill-down routes for full-text retrieval. No license, no API key required.

Curated x402 ecosystem directory — 277 human-reviewed projects: SDKs, production APIs, facilitators, agent frameworks, tools. Spam-filtered alternative to Bazaar (13K entries, 85% spam). Search by keyword or browse by category. Accepts USDC payments on Base and Solana

Convert an amount between currencies and get the exchange rate. Converts between 30+ currencies (USD, EUR, GBP, JPY and more) using daily European Central Bank reference rates with cross-rate calculation, returning the converted amount, the rate and the rate date. Fast currency converter and FX rate lookup for pricing, invoicing and reporting (informational use).

The official daily reference exchange rate between two major fiat currencies out of roughly 30 supported ISO codes, with the rate's effective date. Published once per business day, so it's built for invoice pricing, financial reporting, and normalization tasks rather than live trading, where a stale-by-seconds rate would be a problem. Cached 1 hour.

Convert an amount between currencies at the latest ECB reference rate (Frankfurter, keyless).

Currency exchange rates — Reference FX rates (ECB) with optional amount conversion.

Currency rate conversion

Current Base gas conditions: base fee and priority fee in gwei, at a stated block height. For agents deciding whether to transact now or wait.

Current Base mainnet gas prices. Slow, standard, fast in gwei.

Current Base mainnet block number.

Current Ethereum gas price (wei + gwei)

Get the current time, date, and timezone for a location.

Current time API: the time right now in any IANA timezone (America/Chicago, Asia/Tokyo...) — local ISO timestamp, UTC ISO, unix epoch, human-readable string, and day of week. The sanity check every scheduling, logging, and coordination agent needs. Deterministic and instant.

Get the current time, date, and timezone for a location.

Current UTC unix time. Use for idempotency stamps, expiring links, or clock skew checks. Returns unix seconds, millis, and ISO UTC from the server clock. $0.001 USDC per successful call via x402 on Base—first-party JSON from Delx (fresh each call; not a deterministic transform), no API key, no subscription, and nothing is billed on structured validation errors.

Current VAT rates for an EU member state: standard, reduced, super-reduced and parking rates, from a hand-verified table of European Commission rate data.

Current temperature, wind, humidity, and conditions for any lat/lon (Open-Meteo, keyless).

Current weather conditions for any global location — temperature, feels-like, humidity, precipitation, wind, and human-readable weather description.

Current peaq network gas price (wei + gwei)

Current weather conditions by city or place name.

Current weather conditions by city or place name.

Currently trending coins on CoinGecko

Custom 4-line micro-poem on any topic. AI-powered and memorable.

Weekly official Japan Customs reference exchange rate (税関長公示レート) used to convert import declaration values to yen under Article 4-7 of the Customs Tariff Law -- a live proxy to the Customs weekly CSV, not a real-time market rate. Source: Japan Customs (customs.go.jp), whose terms of use explicitly permit commercial use. Factual published data only; not a live FX quote or trading advice.

US inventory & production cycle signal (bullwhip gauge)

Evaluate whether a mathematical research branch should continue, revise, abstain, or escalate.

Transcribe a base64-encoded PCM WAV clip of at most 60 seconds into text. Input duration is verified before payment. Use constitutes acceptance of https://diem-agent-workers.vercel.app/terms.

Extract facts from supplied text into a caller-provided strict JSON Schema. Use for bounded text-to-JSON normalization when every output field must be machine-validated. Use constitutes acceptance of https://diem-agent-workers.vercel.app/terms.

Summarize bounded source text into a structured abstract and key points without web access or invented facts. Use constitutes acceptance of https://diem-agent-workers.vercel.app/terms.

Convert up to 1,000 characters of text into MP3 speech using a bounded private Venice voice model. Use constitutes acceptance of https://diem-agent-workers.vercel.app/terms.

Generate one safe-mode 1024px WebP draft image from a bounded prompt, with search and prompt enhancement disabled. Use constitutes acceptance of https://diem-agent-workers.vercel.app/terms.

DNS Caa Policy Check: DNS Caa Policy Check checks whether a certificate authority identifier is allowed by CAA records from bounded caller-supplied values without an external provider. Call DNS Caa Policy Check before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS Caa Policy Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, s…

DNS Cname Chain Check: DNS Cname Chain Check checks a caller-supplied CNAME chain for loops and hop budget from bounded caller-supplied values without an external provider. Call DNS Cname Chain Check before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS Cname Chain Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless,…

DNS DKIM Selector Check: DNS DKIM Selector Check checks selector and signing-domain label shapes for a DKIM lookup from bounded caller-supplied values without an external provider. Call DNS DKIM Selector Check before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS DKIM Selector Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party,…

DNS DMARC Policy Parse: DNS DMARC Policy Parse parses DMARC policy, percentage, alignment, and report tags from bounded caller-supplied values without an external provider. Call DNS DMARC Policy Parse before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS DMARC Policy Parse as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless…

DNS DS Record Shape Check: DNS DS Record Shape Check checks DS key tag, algorithm, digest type, and hex digest shape from bounded caller-supplied values without an external provider. Call DNS DS Record Shape Check before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS DS Record Shape Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-…

DNS Https Record Parse: DNS Https Record Parse parses HTTPS service priority, target, and bounded service parameters from bounded caller-supplied values without an external provider. Call DNS Https Record Parse before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS Https Record Parse as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party,…

Resolve A/AAAA/MX/TXT/NS/CNAME records for a domain over DNS-over-HTTPS (Google).

DNS lookup API: resolve any DNS record type (A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV, PTR) for any hostname, with DNSSEC validation status and full answer records (name, type, TTL, data) as JSON. Use for infrastructure monitoring, email deliverability checks, domain verification, and security tooling. Cached 5 minutes.

DNS MX Priority Sort: DNS MX Priority Sort sorts MX exchanges by preference while preserving equal-priority order from bounded caller-supplied values without an external provider. Call DNS MX Priority Sort before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS MX Priority Sort as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, statel…

Resolve multiple DNS record types (A, AAAA, MX, TXT, NS, CNAME) in one call via DoH for deliverability and security agents

Resolve A and AAAA records for a public hostname via DNS-over-HTTPS (60s cache)

DNS SOA Serial Compare: DNS SOA Serial Compare compares SOA serials with 32-bit wraparound ordering from bounded caller-supplied values without an external provider. Call DNS SOA Serial Compare before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS SOA Serial Compare as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memor…

DNS SPF Lookup Budget: DNS SPF Lookup Budget counts DNS-triggering SPF mechanisms against a configured budget from bounded caller-supplied values without an external provider. Call DNS SPF Lookup Budget before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS SPF Lookup Budget as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateles…

DNS SPF Record Parse: DNS SPF Record Parse parses SPF version, mechanisms, modifiers, and terminal policy from bounded caller-supplied values without an external provider. Call DNS SPF Record Parse before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS SPF Record Parse as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, mem…