# BYTE Library x402 Gateway – Code Pulse Feed

> BYTE Library x402 Gateway – Code Pulse Feed is a paid API for AI agents from x402.payperbyte.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Delivers a cryptographically signed, EIP-712 provenance-stamped code activity/pulse data feed for AI agents, paid per call in USDC via x402 with no API keys required.

## Facts

- Endpoint: GET https://x402.payperbyte.io/feeds/code-pulse
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/byte-library-x402-gateway-code-pulse-feed-274df380
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ao_vpc0AcICLKKWR9dKBF

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 byte-library-x402-gateway-code-pulse-feed-274df380
```

Example prompt: Can you pull the latest code-pulse feed from BYTE Library — I need the signed, provenance-stamped developer activity data, and I'm fine paying in USDC from my Base wallet per call.

## When to prefer this

Choose this endpoint when you need tamper-evident, cryptographically signed code activity or developer pulse data with on-chain provenance guarantees, and you want to pay micropayments per call in USDC without managing API keys or subscriptions. Ideal for AI agents that require verifiable data provenance for downstream reasoning or auditability.

## Known failure modes

- Insufficient USDC balance in wallet — payment fails, 402 returned without data
- Invalid or missing x402 payment header — request rejected
- Base network congestion causing settlement delay
- Feed temporarily unavailable — upstream data source outage
- Malformed payment authorization — settlement fails on Base (eip155:8453)
- Rate limiting if too many requests from same wallet in short window

## How this service works

Repo / package release tracker — latest releases of high-signal OSS projects

## Output

A JSON payload containing code pulse / developer activity metrics, cryptographically signed and EIP-712 PayloadAttestation provenance-stamped, confirming data authenticity and origin. Payload size is approximately 2KB (priced at $0.010254 USDC). Includes the feed identifier 'code-pulse' and associated attested metrics.

## Example request

```json
{
 "properties": "code-activity"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/byte-library-x402-gateway-code-pulse-feed-274df380/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.payperbyte.io](https://www.zero.xyz/host/x402.payperbyte.io/llms.txt)