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MARKET MONITOR / CATALOGUE Services 83,381 MCP listed 39,664 x402 43,726 Rails Base / Solana / Polygon / Arbitrum Imported 2026-10-25 · 2 sources
Task

Trivia

8 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.

Random Fact x402 REST usage

Returns a single random fact as JSON in exchange for a micropayment.

randomfactsx402.vercel.app Web & Scraping 314 calls / 30d checked 2026-10-25
0.01 USDC per call per call

Agent Arcade: Reasoning Games x402 REST usage

Twenty-Four daily math puzzle — four numbers to combine into exactly 24; deterministic solvable UTC daily challenge for agent reasoning benchmarks.

agent-arcade.use.x402atlas.com Other services 9 calls / 30d checked 2026-10-25
0.005 USDC per call per call

Saylor Innovations Utilities x402 REST usage

Random riddle - the riddle text and its answer as separate fields, drawn from a curated pool; the response includes the pool size

saylorinnovations.com Crypto & Payments 2 calls / 30d checked 2026-10-25
0.01 USDC per call per call

Saylor Innovations Trivia x402 REST usage

Open Trivia DB category ids and names, for filtering trivia questions

saylorinnovations.com Other services 2 calls / 30d checked 2026-10-25
0.01 USDC per call per call

Random fact x402 REST usage

One curious but true fact, in English or Spanish, filtered by topic: science, computing, history or nature. Takes parameters, returns an id so you can avoid repeats across a session, and accepts a seed for a reproducible...

flat-rate-llm.kikoribera03.workers.dev Web & Scraping 4 calls / 30d checked 2026-10-25
0.005 USDC per call per call

Useless Fact x402 REST usage

Pay a tiny amount of USDC and receive one delightfully useless fact.

x402uselessfacts.vercel.app Crypto & Payments 20 calls / 30d checked 2026-10-25
0.001 USDC per call per call

Citiview Agent Market x402 REST usage

Breached password check: is this password in known data breaches, and how often? Send only the SHA-1 hash (never the password); just the first 5 characters reach Have I Been Pwned (k-anonymity). Up to 50 hashes per call.

agents.citiviewgroup.com Security 3 calls / 30d checked 2026-10-25
0.002 USDC per call per call

AllTheBot Fun fact of the day x402 REST usage

Random fun fact and trivia of the day about France: one surprising, true fact, new every day, in English or French. Fun fact API, JSON.

api.zkrobotics.fr Web & Scraping 3 calls / 30d checked 2026-10-25
0.002 USDC per call per call

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