Dev Utilities Pay-Per-Call AI Services, Page 2
440 paid services found. Status, reliability and price come from our own test calls. Open any row for the full record.
| Service | Category | Status | Recent Checks OK | Response Time | Price Per Call | Last Checked |
|---|---|---|---|---|---|---|
| gpt.558686.xyz | Dev Utilities | Live | 20/20 | 715 ms | $0.002 | 19 min ago |
| base64encode.use.x402atlas.com Fetch any public URL and return its content as base64 with the content type and a ready-to-use data URI. Embe… | Dev Utilities | Live | 20/20 | 341 ms | $0.01 | 19 min ago |
| dns-whois-lookup.underscoredone.com Send up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CA… | Dev Utilities | Live | 20/20 | 136 ms | $0.01 | 19 min ago |
| domain-age-checker.underscoredone.com Send a list of domain names and this tool tells you exactly how old each one is, when it was first registered… | Dev Utilities | Live | 20/20 | 126 ms | $0.01 | 19 min ago |
| domain-availability-checker.underscoredone.com Give this API up to 10 domain names and it tells you whether each has a registration record at the official r… | Dev Utilities | Live | 20/20 | 134 ms | $0.01 | 19 min ago |
| hash-hmac.underscoredone.com Give this API any text or binary data and it returns its fingerprint under whichever hash algorithms you choo… | Dev Utilities | Live | 20/20 | 151 ms | $0.01 | 19 min ago |
| machine.soundiq.io Compute a SHA-256 digest for customer-supplied UTF-8 or base64-decoded bytes through a stable machine endpoin… | Dev Utilities | Live | 20/20 | 558 ms | $0.01 | 19 min ago |
| api.agent-payload-tools.workers.dev Hash text, strings, or UTF-8 payload data with SHA256, SHA384, or SHA512. Compute a cryptographic hash, check… | Dev Utilities | Live | 20/20 | 219 ms | $0.001 | 19 min ago |
| api.agent-preflight.com Pre-execution decision for a metered search or browse tool call. Evaluates the proposal; does not execute the… | Dev Utilities | Live | 20/20 | 164 ms | $0.002 | 19 min ago |
| atomic-verify-claim-poc.topadvancement-atomic.workers.dev Resolve an HTTP or HTTPS URL through redirects and return the complete redirect chain, HTTP status for each h… | Dev Utilities | Live | 20/20 | 10 ms | $0.01 | 19 min ago |
| audit.152-53-82-29.sslip.io Check Python packages from PyPI before you pip install or bump versions. Send {"packages":["requests==2.25.0"… | Dev Utilities | Live | 20/20 | 86 ms | $0.005 | 19 min ago |
| proof.platoskallipolis.com Before an AI agent trusts or pays a public API, inspect its public machine-readable evidence and x402 readine… | Dev Utilities | Live | 20/20 | 47 ms | $0.01 | 19 min ago |
| x402-stall-l3bb.onrender.com Hello from Taiwan — a signed timestamp from my first x402 stall | Dev Utilities | Live | 20/20 | 222 ms | $0.01 | 17 min ago |
| transit.agentic-jp.com Live feed of every active rail disruption across the Japanese (JP) network in one call — delays and suspensio… | Dev Utilities | Live | 20/20 | 619 ms | $0.005 | 17 min ago |
| apexfaucet.xyz The X1 Agent Registry (ERC-8004 for SVM, which APEX deployed on X1 on 27 Sep 2026), in full: every registered… | Dev Utilities | Live | 20/20 | 531 ms | $0.003 | 17 min ago |
| predator-ubuntu.taild9a745.ts.net Small utilities: time, hashing, encoding, math | Dev Utilities | Live | 20/20 | 528 ms | $0.001 | 17 min ago |
| tienda.textokit.store x402 payment test and ping: one call with no required parameters returns server time (ISO 8601 and Unix ms), … | Dev Utilities | Live | 20/20 | 1368 ms | $0.001 | 17 min ago |
| agent-data-tools.revmesh2074.workers.dev Email verification. Check email syntax, DNS and MX records, disposable providers, role addresses, free provid… | Dev Utilities | Live | 20/20 | 631 ms | $0.01 | 17 min ago |
| vending-machine-seven.vercel.app Domain registration status, registrar, dates, and nameservers via RDAP (lite fields only) | Dev Utilities | Live | 20/20 | 264 ms | $0.008 | 17 min ago |
| visuals.use.x402atlas.com Identicon generator — turn an exact UTF-8 seed into a deterministic mirrored avatar returned as base64-encode… | Dev Utilities | Live | 20/20 | 100 ms | $0.005 | 17 min ago |
| api.solgiery.com Base payment check. Returns pong after settlement. | Dev Utilities | Live | 20/20 | 550 ms | $0.01 | 17 min ago |
| api.x-402.online Answer a question about an image, or describe it, from a URL or base64. Image understanding pay-per-call, no … | Dev Utilities | Live | 20/20 | 217 ms | $0.02 | 17 min ago |
| scout.hugen.tokyo Search GitHub repositories — discover open source projects, developer tools, and trending repos. AI agent API… | Dev Utilities | Live | 20/20 | 575 ms | $0.01 | 17 min ago |
| route-a-worker.frostskynet-api.workers.dev Converts text, JSON or JSONL to cleaned JSONL using fixed rules. Removes empty, short and duplicate rows; can… | Dev Utilities | Live | 19/20 | 257 ms | $0.005 | 17 min ago |
| btcnode.uk Live fee rates (high/medium/low sat/vB) — flat $0.001 per call, USDC on Base, no signup. | Dev Utilities | Live | 19/20 | 442 ms | $0.01 | 17 min ago |
| fresh402.kirilllabs.workers.dev Check a persistent watch or URL for changes, with noise filtering, conditional HTTP and a compact determinist… | Dev Utilities | Live | 20/20 | 169 ms | $0.005 | 17 min ago |
| url-uptime-checker.underscoredone.com Checks whether a website or web address is currently reachable and reports how fast it responded. | Dev Utilities | Live | 20/20 | 171 ms | $0.01 | 17 min ago |
| api.coregroupimmo.com Use this service before importing or publishing JSON to check it against a restricted draft-07 schema. Send d… | Dev Utilities | Live | 20/20 | 700 ms | $0.002 | 17 min ago |
| http-status-checker.underscoredone.com Give this API a list of up to 10 web addresses and it will visit each one to tell you whether it is working, … | Dev Utilities | Live | 19/20 | 150 ms | $0.01 | 17 min ago |
| agent-trust-layer.agent-trust-layer.workers.dev Probe an agent-payable HTTP endpoint for current availability, latency, HTTP status, x402 challenge support, … | Dev Utilities | Live | 20/20 | 1652 ms | $0.01 | 17 min ago |
| app.aabc.app AABC Base Agent Report | Dev Utilities | Live | 20/20 | 1147 ms | $0.01 | 17 min ago |
| dep.halowerk.com Calculates release intervals and inactivity from current registry timestamps. Missing facts are returned as n… | Dev Utilities | Live | 20/20 | 572 ms | $0.004 | 17 min ago |
| ip.halowerk.com Inspect one IP address for network ownership, location and abuse signals. | Dev Utilities | Live | 19/20 | 553 ms | $0.001 | 17 min ago |
| npm-downloads-range.hergertsynthora.com Returns a per-day download time series for an npm package over a period from keyless api.npmjs.org — the raw … | Dev Utilities | Live | 20/20 | 671 ms | $0.001 | 17 min ago |
| pkgpulse.letom1176.workers.dev Rank up to 5 alternative npm packages and get a recommendation with the gap quantified: full disclosed-rubric… | Dev Utilities | Live | 20/20 | 290 ms | $0.01 | 15 min ago |
| pkgsafe.adrwent.fyi Call before installing or updating an npm or PyPI dependency. Returns a verdict (ok, caution, avoid, unknown)… | Dev Utilities | Live | 20/20 | 446 ms | $0.005 | 15 min ago |
| port-scanner.underscoredone.com Give this API a hostname or IP address and it tries connecting to each port in your requested range. For ever… | Dev Utilities | Live | 20/20 | 151 ms | $0.01 | 15 min ago |
| prop.halowerk.com Subtracts exported energy from supplied site energy, divides by conditioned floor area and selects the first … | Dev Utilities | Live | 20/20 | 542 ms | $0.002 | 15 min ago |
| validate.yankii.fr Validate JSON data against a JSON Schema (draft-07, Ajv). Returns valid + detailed errors with instance paths. | Dev Utilities | Live | 20/20 | 344 ms | $0.01 | 15 min ago |
| www.tereno.xyz What is the current state of Base? Latest block number, timestamp, base fee and suggested gas fees in a singl… | Dev Utilities | Live | 20/20 | 337 ms | $0.005 | 15 min ago |
| hubvibe-io.com Email verification / email validation: will mail to this address arrive? Checked live at the source: syntax, … | Dev Utilities | Live | 20/20 | 457 ms | $0.02 | 15 min ago |
| deltasignal-mcp-gcp-canary-mhaufviwaq-uc.a.run.app Compact Daily Monitoring snapshot for the tracked slice. | Dev Utilities | Live | 20/20 | 178 ms | $0.03 | 15 min ago |
| baconservices.com Web Image Optimizer: Resizes one image so its longest side is at most max_width pixels (never enlarging it) a… | Dev Utilities | Live | 20/20 | 352 ms | $0.01 | 15 min ago |
| aegis-ai.xyz Aegis curated briefing — AI-scored content feed with V/C/L metrics | Dev Utilities | Live | 20/20 | 240 ms | $0.01 | 15 min ago |
| irish-auto-arbitrage-production.up.railway.app Irish market prices for a make and model - Use for an overview of one model in the Irish used market: listing… | Dev Utilities | Live | 20/20 | 167 ms | $0.01 | 15 min ago |
| swarm-agent.net SWARM Utilities - UUIDs, hashes, base64/URL encoding, secure passwords and timestamp conversion. Pick one wit… | Dev Utilities | Live | 20/20 | 442 ms | $0.02 | 15 min ago |
| vendsdk.com SSRF-safe public GET with status, headers, and size-capped JSON/text body for agent tool use | Dev Utilities | Live | 20/20 | 189 ms | $0.004 | 15 min ago |
| aiagentoracle.ai AgentOracle: live service-health snapshot — tracked-token count, last ingestion timestamp, ingestion error co… | Dev Utilities | Live | 20/20 | 299 ms | $0.01 | 15 min ago |
| api.gadgethumans.com Generate fresh random UUID v4 identifiers, one or many in a single call. Cryptographically random, instant. U… | Dev Utilities | Live | 20/20 | 106 ms | $0.001 | 15 min ago |
| compute-api-production-245d.up.railway.app Estimate token count | Dev Utilities | Live | 20/20 | 183 ms | $0.001 | 13 min ago |
“Recent Checks OK” = how many of our last test calls (up to 20) worked: the service asked for payment correctly. Shown once there are at least 5 recent checks and at least one worked. “Needs Login” means the service asked for a key or login (HTTP 401 or 403), which is not a failure. These are facts, not a quality ranking. Services can reply or dispute.