# SYLPHY Private Trading Intent Submission

> SYLPHY Private Trading Intent Submission is a paid API for AI agents from api.sylphyagent.com, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Submits an encrypted token swap intent for execution via a privacy-preserving autonomous trading agent on Base

## Facts

- Endpoint: POST https://api.sylphyagent.com/api/intents/trade
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sylphy-private-trading-intent-submission-b61f618e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_O56Fn7jL3M5XHSDXRDusN

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 sylphy-private-trading-intent-submission-b61f618e -d '<json body>'
```

Example prompt: Swap 100 USDC for ETH on Base using my agent wallet 0xABC123... — route it through Sylphy with encrypted intent so the trade is private but the settlement is verifiable on-chain.

## When to prefer this

Choose this endpoint when an AI agent or wallet needs to execute a token swap on Base with privacy-preserving encrypted intents, policy enforcement, and on-chain verifiable settlement — particularly when auditability and confidentiality are both required. Prefer this over standard DEX APIs when intent privacy and agent-native workflows matter.

## Known failure modes

- Invalid or unsupported token address returns an error response
- Insufficient balance in agentWallet causes intent rejection
- Malformed amountIn (e.g. non-numeric or negative) causes a validation error
- Missing required fields (tokenIn, tokenOut, amountIn, agentWallet) returns a 400-level error
- Policy check failure (e.g. restricted token or wallet) blocks intent submission
- Network or blockchain congestion may cause delayed status updates

## How this service works

Sylphy helps wallets, apps, and AI agents execute payments and settlements with encrypted intent, policy checks, and audit proofs — while final settlement remains verifiable on Base.

## Output

Returns a JSON object with a 'status' field (e.g. 'pending') and an 'intentId' (e.g. '0xabc...') that identifies the submitted encrypted trading intent on Base for tracking and settlement verification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tokenIn": {
   "type": "string"
  },
  "amountIn": {
   "type": "string"
  },
  "tokenOut": {
   "type": "string"
  },
  "agentWallet": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "pending",
  "intentId": "0xabc..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sylphy-private-trading-intent-submission-b61f618e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sylphyagent.com](https://www.zero.xyz/host/api.sylphyagent.com/llms.txt)