# Show HN: a0flow — paid micro-APIs for AI agents, x402/USDC, no signup

> Source: <https://a0flow.com>
> Published: 2026-09-22 18:34:29+00:00

Everything below runs live, right now, on these domains. Payment is USDC on Base — no accounts, no invoices, on-chain proof for both sides.

Your website, measured and roasted, then fixed. Free roast first — you only pay if the facts sting.

Turn any endpoint into a USDC pay-per-call API. We run production x402 on three domains — the demo is this very site.

Proof we ship working things, not decks:

`/` with any non-HTML `Accept` header and you get the JSON manifest (endpoints, per-call prices, payment requirements). All paid calls follow `GET → 402 → pay USDC on Base → retry with X-PAYMENT`. Facilitator: ultravioletadao.xyz.
  `admin@updatesbyai.com`. Payment address (USDC on Base): `0xa1b8be63bde77ddc65d9ffe8a21a2a5f2c9ca6a8`.