# Compute3.AI Account Top-Up

> Compute3.AI Account Top-Up is a paid API for AI agents from api.compute3.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Adds funds to a Compute3.AI account balance using a crypto payment (USDC via x402 protocol)

## Facts

- Endpoint: POST https://api.compute3.ai/api/x402/top_up
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/compute3-ai-account-top-up-bb076b52
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hzP241EwVFsTz5dbONXuo

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 compute3-ai-account-top-up-bb076b52 -d '<json body>'
```

Example prompt: Top up my Compute3.AI account balance by $25 — use my existing user ID so it goes to the right account.

## When to prefer this

Use this endpoint when an agent or user needs to replenish Compute3.AI account credits using USDC crypto payments via the x402 protocol, especially in automated workflows where compute credits may run low and need programmatic top-up without manual intervention.

## Known failure modes

- Insufficient crypto payment — payment below minimum $0.01 threshold
- Invalid or malformed user_id UUID — returns 400 error
- Payment not confirmed on-chain — transaction pending or failed
- Amount below minimum ($0.01) — returns validation error
- x402 payment header missing or invalid — returns 402 Payment Required

## How this service works

Top up account balance with crypto payment

## Output

Returns a confirmation of the top-up transaction, the credited amount, and the resulting account balance or a newly auto-created user identifier if no user_id was provided.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "amount": {
   "type": "number",
   "minimum": 0.01,
   "description": "Top-up amount in USD"
  },
  "user_id": {
   "type": "string",
   "description": "User UUID (optional — omit to auto-create from wallet)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/compute3-ai-account-top-up-bb076b52/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.compute3.ai](https://www.zero.xyz/host/api.compute3.ai/llms.txt)