# x402 Agent Economy Lab – Text Embed Endpoint (Real-USDC Rail)

> x402 Agent Economy Lab – Text Embed Endpoint (Real-USDC Rail) is a paid API for AI agents from rqjzcd-ip-209-115-177-214.tunnelmole.net, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Accepts a text string and returns a vector embedding, payable per call in real USDC on Base mainnet via the x402 protocol.

## Facts

- Endpoint: POST https://rqjzcd-ip-209-115-177-214.tunnelmole.net/v1/embed
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-agent-economy-lab-text-embed-endpoint-real-usdc-rail-da709ef2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LlcRp5_XLYcmCenDtwMIb

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 x402-agent-economy-lab-text-embed-endpoint-real-usdc-rail-da709ef2 -d '<json body>'
```

Example prompt: Generate a vector embedding for this text: 'The quarterly revenue exceeded expectations due to strong product adoption.' — I need the embedding so I can store it in my vector database for semantic search.

## When to prefer this

Choose this endpoint when you need machine-payable, per-call text embeddings with micropayment settlement in real USDC on Base mainnet — ideal for AI agents operating autonomously in the x402 payment ecosystem. Prefer this over free or subscription-based embedding APIs when your agent stack requires trustless, crypto-native payment rails without API keys or billing accounts.

## Known failure modes

- Payment failure: insufficient USDC balance on Base mainnet returns a 402 Payment Required error
- Empty or missing text field returns a 400 Bad Request
- Text input exceeding model token limit may be truncated or rejected
- Tunnelmole tunnel downtime causes connection refused or 502/503 errors
- Network latency on Base mainnet payment settlement may cause timeout

## How this service works

Machine-payable NLP micro-services: sentiment, entity extraction, summarization, report, batch. Paid per call in REAL USDC on Base mainnet.

## Output

Returns a dense numerical vector (embedding) representing the semantic content of the input text. The vector can be used for downstream tasks such as semantic search, similarity computation, clustering, classification, or storage in a vector database. Payment of $0.003 USDC is debited from the caller's wallet on Base mainnet per successful call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-agent-economy-lab-text-embed-endpoint-real-usdc-rail-da709ef2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from rqjzcd-ip-209-115-177-214.tunnelmole.net](https://www.zero.xyz/host/rqjzcd-ip-209-115-177-214.tunnelmole.net/llms.txt)