# Paylyte Bitcoin Fee Rate Forecast

> Paylyte Bitcoin Fee Rate Forecast is a paid API for AI agents from api.paylyte.ai, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-30).

Returns a median fee rate forecast for a near-future Bitcoin block, committed as a cryptographically verifiable Proof of Outcome claim.

## Facts

- Endpoint: GET https://api.paylyte.ai/v1/data/fees/forecast?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/paylyte-bitcoin-fee-rate-forecast-29d6ba01
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5nF1w4lK0D7dT3rdZH1A4

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 paylyte-bitcoin-fee-rate-forecast-29d6ba01
```

Example prompt: What's the forecasted median Bitcoin fee rate for the next block, and can I get that with a Proof of Outcome attestation so I can verify it later?

## When to prefer this

Choose this endpoint when you need a Bitcoin fee rate forecast that is not just a raw estimate but comes with a cryptographic Proof of Outcome commitment — making it auditable and verifiable after the fact. Ideal for automated payment pipelines, compliance-sensitive workflows, or any application where fee data integrity must be provable. Prefer this over generic mempool APIs when verifiable attestation of the forecast is a requirement.

## Known failure modes

- Payment not fulfilled (x402 protocol failure) — 402 Payment Required response
- Mempool data temporarily unavailable — may return an error or stale forecast
- Network connectivity issues to upstream fee data source — service may be degraded
- Invalid or malformed GET request — 400 Bad Request
- Rate limiting or quota exceeded — 429 Too Many Requests

## How this service works

Median fee rate forecast for a near-future block, committed as a Proof of Outcome claim.

## Output

Returns a structured JSON object containing the product name, fee tier label, a forecast object with the median fee rate for the near-future block, a Proof of Outcome cryptographic commitment, the basis data underlying the forecast, and the source of the data. The Proof of Outcome allows downstream verification that the forecast was committed before block confirmation.

## 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",
     "required": [
      "product",
      "tier",
      "forecast",
      "proofOfOutcome",
      "basis",
      "source"
     ],
     "properties": {
      "tier": {
       "type": "string"
      },
      "basis": {
       "type": "object"
      },
      "source": {
       "type": "string"
      },
      "product": {
       "type": "string"
      },
      "forecast": {
       "type": "object"
      },
      "proofOfOutcome": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/paylyte-bitcoin-fee-rate-forecast-29d6ba01/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.paylyte.ai](https://www.zero.xyz/host/api.paylyte.ai/llms.txt)