---
title: "Get deep enriched signal (x402, pay-per-call USDC on Base)"
method: POST
path: "/api/agent/deep-signal/x402"
tags: ["deep-signal"]
---

# Get deep enriched signal (x402, pay-per-call USDC on Base)

`POST /api/agent/deep-signal/x402`

## Request

- Base URL: `https://signals.gitdealflow.com`
- URL: `https://signals.gitdealflow.com/api/agent/deep-signal/x402`
- Auth: none declared
- TypeScript: <https://skmtc.dev/gitdealflow/apis/vc-deal-flow-signal-api/docs/api/agent/deep-signal/x402/post.ts> (a function with typed inputs; its response is checked against the schema)

Same payload as /api/agent/deep-signal but priced and authenticated via the x402 protocol (HTTP 402 micropayments). $0.19 USDC per successful call on Base mainnet. No signup, no API key, agents pay per request via the X-PAYMENT header (EIP-3009 transferWithAuthorization). Misses (404) are not charged. Settled by the Coinbase x402 facilitator. See https://x402.org for client implementations.

## Request body

- object
  - `name` string, required: Startup display name or GitHub org slug.

## Response `200`

Deep signal payload, settled. Response includes X-PAYMENT-RESPONSE header with transaction reference.

- DeepSignal
  - `found` boolean, required
  - `name` string
  - `sector` string
  - `stage` string
  - `geography` string
  - `signalType` string
  - `scores` object
    - `velocity` integer
    - `growth` integer
    - `novelty` integer
    - `composite` integer
  - `rank` object
    - `inSector` integer
    - `sectorTotal` integer
    - `sectorPercentile` integer
  - `thesis` string
  - `comparables` object[]
    - `name` string
    - `commitVelocityChange` string
    - `signalType` string
  - `balance` integer
  - `charged` integer
  - `citation` string

## Other responses

- `402`: Payment Required. Response body lists supported payment requirements (network, asset, payTo, price). Agent signs an EIP-3009 authorization and retries with X-PAYMENT header.
- `404`: Startup not in tracked universe, no settlement performed.
- `503`: x402 endpoint not configured (X402_PAY_TO_ADDRESS env var missing).

## Changes

- **2026-08-14** `e8fe6095df09`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/gitdealflow/apis/vc-deal-flow-signal-api/changes/api/agent/deep-signal/x402/post.md)

---

[API](https://skmtc.dev/gitdealflow/apis/vc-deal-flow-signal-api.md) - [All operations](https://skmtc.dev/gitdealflow/apis/vc-deal-flow-signal-api/llms.txt) - [OpenAPI document](https://skmtc.dev/gitdealflow/apis/vc-deal-flow-signal-api/revisions/1150ac4e7a23?raw)