Synapse Random Fact API

x402

Synapse Random Fact API is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Returns a random interesting fact with its category via a pay-per-call x402 micropayment endpoint

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.

Output

A JSON object containing a 'fact' field with the full text of a random interesting fact, and a 'category' field indicating the topic area (e.g. 'general'). No pagination or filtering — each call returns one randomly selected fact.

Example use cases

Daily fun fact for newsletter

“Fetch me a random interesting fact I can use as the 'did you know' section in today's email newsletter.”

Trivia icebreaker for meeting

“Give me a random trivia fact I can share at the start of our team meeting to break the ice.”

Chatbot conversation starter

“Pull a random fun fact my chatbot can use to greet users when they first open the app.”

Technical details

Endpoint

GEThttps://anibalb.duckdns.org/x402/random-fact?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a lightweight, no-account, pay-per-call random fact with no setup friction. Ideal for agents that need occasional trivia or icebreaker content and want to pay micro-amounts per call rather than maintaining a subscription. Not suitable if you need facts filtered by a specific category or topic.

Side effects

Payment not included or insufficient USDC — returns HTTP 402 Payment Required
Network or server unavailability on the DuckDNS host — returns connection timeout or 5xx error
Malformed payment header — rejected before fact is returned

Input

Schema · Request body

Field	Type	Description
properties	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "fact": "Honey never spoils. Archaeologists have found pots of honey in ancient Egyptian tombs that are over 3000 years old and still edible.",
    "category": "general"
  }
}

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