x402 Directory

Developer tools

Paid developer tools APIs an AI agent can call with x402.

272 endpoints

Loyalspark · Recipient API Offers

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.001 Base 100% up 1,310 paid calls

Loyalspark · Workflow Reward Status

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.001 Base 100% up 548 paid calls

Loyalspark · Recipient API Vouchers

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.001 Base 100% up 541 paid calls

Loyalspark · Recipient API Rewards

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.001 Base 100% up 486 paid calls

Loyalspark · Recipient API Prepare Transfer

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.005 Base 100% up 419 paid calls

Loyalspark · Recipient API Balances

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.001 Base 100% up 357 paid calls

Onesource · Chain Proxy

Onesource · api.onesource.io

Detect upgradeable proxy patterns (EIP-1967, UUPS, Transparent) via eth_getStorageAt - returns the implementation address behind a proxy

$0.005 Base 100% up 227 paid calls

Horror Story API · Horror Story

Horror Story API · horrorstoryapi.vercel.app

Access the exclusive horror story collection (pay-per-read).

$0.0013 Base 166 paid calls

Roast Generator · Roast

Roast Generator · roastx402endpoint.vercel.app

Pay for a lighthearted developer roast generated on-demand.

$0.0017 Base 137 paid calls

Timezone Converter · Convert Timezone

Timezone Converter · 402timezones.vercel.app

Convert a time between any two IANA time zones (DST-aware). Pay-per-call in USDC on Base.

$0.001 Base 133 paid calls

Affiliate.com · Merchants

Affiliate.com · zeroclick.affiliate.com

List the merchants behind the catalog. Filter by name or domain search, by country, or by product count, and page through the results.

$0.02 Base 113 paid calls

Oblique Markets · Paid Time

Oblique Markets · api.oblique.markets

Use when an agent needs time. Returns Current server time. $0.01.

$0.01 Base 100% up 113 paid calls

Loyalspark · Recipient API Cancel Offer

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.005 Base 100% up 110 paid calls

Weight Converter API · Convert Weight

Weight Converter API · weight402endpoint.vercel.app

Convert a weight/mass value between units (kg, g, lb, oz, stone, tonne, and more).

$0.0025 Base 108 paid calls

Loyalspark · Workflow Prepare Reward Redemption

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.005 Base 100% up 106 paid calls

Europe West4 · Items

Europe West4 · spawnxchange-api-485602182462.europe-west4.run.app

List your AI-generated code for other agents to buy: upload an artifact and list it for a flat fee — no account needed; your wallet is your seller identity.

$0.01 Base 91 paid calls

Loyalspark · Recipient API Redeem Reward

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.01 Base 100% up 85 paid calls

Europe West4 · Items Acquire

Europe West4 · spawnxchange-api-485602182462.europe-west4.run.app

Buy the selected AI-generated code artifact. Paying this authorization grants you a licence and returns an instant download link plus an invoice.

$1.00 Base 85 paid calls

Affiliate.com · Products

Affiliate.com · zeroclick.affiliate.com

Search more than one billion affiliate products refreshed daily. Pass a plain search string or an array of field filters, or use the structured query rule builder for compound conditions. Results carry pricing, availability, commission URLs, and network and merchant attribution, with support for field selection, pagination, sorting, facets, and per network affiliate link configuration.

$0.02 Base 83 paid calls

Loyalspark · Recipient API Accept Offer

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.01 Base 100% up 75 paid calls

Strale · Github Repo Analyze

Strale · api.strale.io

Analyze a public GitHub repository. Returns tech stack, documentation quality, activity level, bus factor, maintenance health score. Uses GitHub API + AI analysis.

$0.05 Base 100% up 68 paid calls

Skill: Decode this blob · Skill Decode Blob

Skill: Decode this blob · agent402.tools

Bundled execution of the Decode this blob workflow - Hand the agent an opaque string - a JWT, a base64'd JSON payload, a gzip-encoded API response, a hex-encoded hash - and walk it through identifying what it is and unwrapping it layer by layer until it's human-readable. One x402 payment runs 7 underlying tools (jwt-decode, gunzip, brotli-decompress, base64, hex, json-format, hash); partial-success per step.

$0.007 Base 100% up 58 paid calls

GridPulse · Energy Carbon Intensity

GridPulse · gridpulse.theaslangroupllc.com

Live grid carbon intensity, deterministic. Answers "how clean is the grid right now", "gCO2 per kWh in Germany", "cleanest hour to run a job today". Current intensity + forward curve (to 48h) + cleanest and dirtiest slots, from NESO (GB national + 14 DNO regions) and energy-charts/Fraunhofer ISE (DE FR NL BE AT ES IT NO). No LLM, no key. Pair with /api/energy/compute-window for full job scheduling.

$0.01 Base 57 paid calls

DNS & WHOIS Domain Lookup · Whois

DNS & WHOIS Domain Lookup · dns.use.x402atlas.com

WHOIS domain lookup — raw registry text with registrar, nameservers, lifecycle dates and status, plus the responding server. Use the RDAP endpoint when you need parsed structured data.

$0.005 Base 100% up 50 paid calls