SUAN

x402 Compute

Checking

AI agents pay per call for compute on BNB Chain: no sign-up, no account, one request settles one payment. Built for the Binance AI agent stack and compatible with Binance x402: Binance Agentic Wallet, Trust Wallet AgentKit and other x402 wallets can pay directly. 15% of x402 volume buys back and burns $SUAN every day.

Holding BEAD makes compute cheaper.

L1

Revenue & buyback

Waiting for buyback

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Next buyback in

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Every day at 12:00 UTC, 15% of that day’s x402 volume buys $SUAN on chain and sends it to the dead address.

Total x402 volume

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Volume, last 24h

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Payments / payers

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Total bought back

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Total SUAN burned

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Pay-to address

Published at launch

Recent buybacks

No buybacks yet. The first one runs at the next 12:00 UTC after launch.

L2

How agents integrate

  1. 1

    Call it and get a 402

    Call the endpoint as usual. The server answers 402 with a base64 PAYMENT-REQUIRED header describing network, asset, amount and pay-to address.

  2. 2

    Sign with the wallet

    The agent wallet signs a payment authorization. USD1 uses EIP-3009 with no gas; USDT and USDC use Permit2 with a one-time approval.

  3. 3

    Replay with the signature

    Send the same request again with a PAYMENT-SIGNATURE header. Once the payment settles on chain you get the result, and the PAYMENT-RESPONSE header carries the tx hash.

Accepted assets

Network: BNB Chain (eip155:56) · Protocol: x402 v2

AssetSignatureGas
USD1EIP-3009No gas, the signature is the payment
USDTPermit2One-time approval (sponsored by the Binance wallet on BSC)
USDCPermit2One-time approval (sponsored by the Binance wallet on BSC)

1 · See the 402

curl -i -X POST "https://api.suan.bid/x402/credit?usd=1"

# HTTP/1.1 402 Payment Required
# PAYMENT-REQUIRED: <base64 payment requirements>

2 · Pay with Binance Agentic Wallet

# 1. Read the payment requirements
baw x402-payment preview --paymentRequirements <PAYMENT-REQUIRED header> --json

# 2. Sign (index 1 = the asset you pay with)
baw x402-payment sign --paymentId <id> --selectedIndex 1 --json

# 3. Replay the same request with the signature
curl -i -X POST "https://api.suan.bid/x402/credit?usd=1" \
  -H "PAYMENT-SIGNATURE: <signature>"
# → 200, PAYMENT-RESPONSE header carries the tx hash

3 · Pay per call for a model (OpenAI-compatible)

curl -i -X POST "https://api.suan.bid/x402/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "PAYMENT-SIGNATURE: <signature>" \
  -d '{
    "model": "openai/gpt-4o-mini",
    "messages": [{ "role": "user", "content": "Hello" }],
    "max_tokens": 256
  }'

The top-up endpoint returns a SUAN API key that works with every model and tool, so you do not have to sign each call.

L3

Paid resources

  • GET/x402Catalogue: resources, accepted assets, pay-to address and model ids.
  • POST/x402/credit?usd=1|5|20|100Top up $1, $5, $20 or $100 and get a SUAN API key for every model and tool.
  • POST/x402/v1/chat/completionsOpenAI-compatible chat, any of 400+ models, non-streaming.
  • POST/x402/tools/{chain.read|web.search|web.scrape}Tools: read chain data, search the web, scrape a page.
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