# BYTE Library Wiki Facts Feed

> BYTE Library Wiki Facts Feed is a paid API for AI agents from x402.payperbyte.io, paid per call via x402, $0.004883/call, status unknown (last checked 2026-09-13).

Returns cryptographically signed, EIP-712 provenance-stamped Wikipedia-sourced factual data payable per-call via x402 USDC on Base

## Facts

- Endpoint: GET https://x402.payperbyte.io/feeds/wiki-facts
- Price: $0.004883/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/byte-library-wiki-facts-feed-18d68883
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MhsfMh7mrfRWcDqblMk5b

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability byte-library-wiki-facts-feed-18d68883
```

Example prompt: Fetch me a cryptographically signed, provenance-stamped wiki facts payload from the BYTE Library feed — I need verified factual data I can trust, with EIP-712 attestation, paid in USDC with no API key.

## When to prefer this

Prefer this endpoint when you need Wikipedia-sourced factual data with strong provenance guarantees — cryptographic signing and EIP-712 attestation — and want to pay per call in USDC without managing API keys. Ideal for AI agents that must cite verifiable, tamper-evident facts or feed data into slashable oracle workflows on Base.

## Known failure modes

- Insufficient USDC balance — payment authorization fails, 402 returned
- Invalid or missing x402 payment header — request rejected
- Malformed properties filter parameter — 400 bad request
- Feed temporarily unavailable — 503 service error
- Payment settlement failure on Base network — transaction timeout

## How this service works

Verified, provenance-first data feeds for AI agents. Every payload is cryptographically signed and EIP-712 PayloadAttestation provenance-stamped — covering crypto markets, DeFi yields, weather, earthquakes, news, code-pulse, threat-intel, and a slashable fact-oracle. Pay per call in USDC over x402 with no API keys — a wallet, not a secret on the box. Settlement is on Base (eip155:8453). Price is per-feed, derived from expected payload size at $0.005000/KB (floor $0.001000).

## Output

A JSON payload containing Wikipedia-sourced factual data, cryptographically signed and stamped with an EIP-712 PayloadAttestation for provenance verification. The payload is delivered after a per-call USDC micropayment (~$0.004883) settled on Base. The response includes the feed name ('wiki-facts') and the attested fact content.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "feed": "wiki-facts"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/byte-library-wiki-facts-feed-18d68883/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.payperbyte.io](https://www.zero.xyz/host/x402.payperbyte.io/llms.txt)