# Riddle Oracle

Pay a micro-fee in USDC on Base mainnet to receive a riddle and its answer.

- Status: Listed — not yet verified
- Category: [Infrastructure & Facilitators](https://x402looker.com/category/infrastructure-facilitators/)
- Website: https://riddlex402.vercel.app

## What it does

Pay a micro-fee in USDC on Base mainnet to receive a riddle and its answer.

Audience: ai-agents, developers. Tags: oracle, riddle, micro-fee, mainnet.

## Pricing

- Pricing model: per-request
- Price hint: $0.002/request
- Accepted tokens: USDC
- Chain: base
- Facilitator: coinbase-cdp

## How agents pay

1. The agent sends a plain request and receives an HTTP 402 response describing the price and payment requirements.
2. The agent signs a payment payload for the exact amount on base and attaches it to a retried request.
3. The facilitator verifies and settles the payment, then the service returns the paid response.

## Related services

- [OnRamperX](https://x402looker.com/service/onramperx/) — OnRamperX is a non-custodial value router for agents and humans: fiat<->crypto and cross-chain via one quote interface (Coinbase Onramp v2.
- [TraBot Pearl Intel](https://x402looker.com/service/trabot-pearl-intel/) — Hero SKU: Pearl Research L1 telemetry (pearld RPC, community nodes, poll history).
- [RobinX](https://x402looker.com/service/robinx/) — Live scored launch feed (realtime) — or add ?tier=free for the 10-min-delayed free feed, or ?tier=alpha ($0.02) for caller_signal enrichment.

## Facet hubs

- Chain hub: [Base services](https://x402looker.com/chain/base/)
- Facilitator profile: [Coinbase Cdp](https://x402looker.com/facilitator/coinbase-cdp/)
- Price band: [Micro ($0.01 or less per request)](https://x402looker.com/price-band/micro/)

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Last updated: 2026-09-23
Last checked: 2026-09-28 — reachable. Weekly automated check, not continuous monitoring.