# SYLPHY Intent Submission

> SYLPHY 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 a private token swap intent with encrypted parameters for policy-checked settlement on Base

## Facts

- Endpoint: POST https://api.sylphyagent.com/api/intent
- 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-29038d3e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YHIPckA6ku-bxakRN1kf2

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-29038d3e -d '<json body>'
```

Example prompt: Swap 100 USDC for WETH on Base using Sylphy's private intent system, with a minimum output of 0.035 WETH, and give me the intent ID when it's submitted.

## When to prefer this

Use this endpoint when you need to execute a private, policy-enforced token swap on Base with encrypted intent submission and an on-chain verifiable audit trail. Prefer this over standard DEX aggregators when privacy, policy compliance, or audit proofs are required for the trade.

## Known failure modes

- Invalid or unsupported token address for tokenIn or tokenOut returns an error
- amountIn not parseable as a valid token amount causes rejection
- minAmountOut not satisfiable at current market conditions may cause intent failure or rejection
- Missing required fields returns a validation error
- Payment not included or insufficient USDC payment returns 402
- Network or policy check failure returns an internal error status

## 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

A JSON object containing a status field (e.g. 'pending') and an intentId (a hex string like '0xabc...') representing the submitted swap intent awaiting settlement on Base.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tokenIn": {
   "type": "string"
  },
  "amountIn": {
   "type": "string"
  },
  "tokenOut": {
   "type": "string"
  },
  "minAmountOut": {
   "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-29038d3e/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)