---
title: "Mempool Average Relative Fee"
method: GET
path: "/v1/metrics/mempool/fees_average_relative"
---

# Mempool Average Relative Fee

`GET /v1/metrics/mempool/fees_average_relative`

**Definition.** The mean relative fee of transactions waiting in the mempool.\n\n**Technical.** The relative fee is calculated as total transaction fees divided by transaction size (in vByte).\n\n**Interpretation.** High relative fees indicate transaction urgency, as miners optimise for fee per size rather than total fee. The total fee a miner can collect from a block is bounded by available block space.\n

[View in Studio](https://studio.glassnode.com/charts/mempool.FeesAverageRelative?a=BTC)

## Query parameters

- `a` string, required
- `s` integer
- `u` integer
- `i` string
- `f` 'csv' | 'json'
- `timestamp_format` 'unix' | 'humanized'

## Response `200`

Successful response

- TimeSeriesDataPoint[]
  - `t` integer — Unix timestamp
  - `v` union — Metric value (can be number, object, or array depending on the metric)
    - number
    - object
  - `o` object — Object containing multiple metric values (when applicable)

## Other responses

- `400` — Bad Request - Invalid parameters or unsupported asset
- `401` — Unauthorized - Invalid or missing API key
- `429` — Too Many Requests - Rate limit exceeded

---

[API](https://skmtc.net/glassnode/apis/glassnode-api-addresses.md) · [All operations](https://skmtc.net/glassnode/apis/glassnode-api-addresses/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/glassnode/glassnode-api-addresses/versions/7f6a24031f46/schema)