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MEV Block Analytics
x402
MEV Block Analytics is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-25).
Fetches recent MEV-boosted Ethereum block data including builder activity, gas utilization, and proposer payments from Flashbots relay
Price / call$0.002
Success—
StatusUnknown
How this service works
Ethereum MEV-Boost delivered blocks from the Flashbots relay: proposer payment in ETH (block value), transaction count, gas used vs limit, and builder pubkeys with block counts. Covers the newest blocks only (1 to 50). Sandwich volume is not in this source and is not reported.
Output
Returns a JSON object containing an array of recent MEV-boosted Ethereum blocks (each with slot, block number, builder pubkey, transaction count, gas used/limit, gas utilization %, and proposer payment in ETH), a list of top builders by block count, aggregate stats (average and total proposer payment in ETH, total block count), the Flashbots relay source URL, and a timestamp of when data was checked.
Example use cases
MEV revenue tracking for validators
“Pull the last 15 MEV blocks from the Flashbots relay and tell me what the average proposer payment is and who the dominant block builders are.”
Gas utilization monitoring on Ethereum
“What's the current gas utilization across recent MEV-boosted Ethereum blocks? Show me the last 10 blocks and flag any that are above 90% utilization.”
Block builder market share analysis
“Fetch the latest 50 MEV blocks from Flashbots and tell me which builder public keys are winning the most blocks — I want to understand builder concentration right now.”
Technical details
Endpoint
GEThttps://api.chainmarket-api.workers.dev/api/crypto/mev-block-analytics?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time MEV block analytics sourced directly from the Flashbots boost relay, including builder competition data, proposer payments, and gas utilization. Prefer this over generic block explorers when you specifically need MEV-relay-delivered block data with builder attribution and payment breakdown, without requiring an API key or account setup.
Side effects
- Flashbots relay unavailable or returns empty data — response may show zero blocks or error
- Invalid limit parameter (out of range 1-50) may return an error or default to 10
- Network timeout to Flashbots relay causes delayed or failed response
- Payment failure — call not charged if x402 payment does not go through
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"blocks": [
{
"slot": 15493647,
"numTx": 427,
"gasUsed": 56657250,
"gasLimit": 60000000,
"blockNumber": 26254436,
"builderPubkey": "0x88510a78794b69e07f73b2f3ee309f78fc372dcb2ed85d5f80bbe7ebc579778f2a7d6aafbb8b00c00cb7241e1c800d65",
"gasUtilizationPct": 94.43,
"proposerPaymentEth": 0.008564297047065914
},
{
"slot": 15493560,
"numTx": 215,
"gasUsed": 21940433,
"gasLimit": 60000000,
"blockNumber": 26254350,
"builderPubkey": "0x88510a78794b69e07f73b2f3ee309f78fc372dcb2ed85d5f80bbe7ebc579778f2a7d6aafbb8b00c00cb7241e1c800d65",
"gasUtilizationPct": 36.57,
"proposerPaymentEth": 0.01024089989571211
}
],
"source": "https://boost-relay.flashbots.net/relay/v1/data/bidtraces/proposer_payload_delivered",
"checkedAt": "2026-10-23T09:35:55.434Z",
"blockCount": 10,
"topBuilders": [
{
"blocks": 7,
"builderPubkey": "0x88510a78794b69e07f73b2f3ee309f78fc372dcb2ed85d5f80bbe7ebc579778f2a7d6aafbb8b00c00cb7241e1c800d65"
},
{
"blocks": 2,
"builderPubkey": "0x850b00e055388c1b56f137e0852bc02d8b05534e9f96dd1d11cff8cf0481b800ecc2e708cdc158cd95b7cfdaa6840ee7"
}
],
"avgProposerPaymentEth": 0.006436,
"totalProposerPaymentEth": 0.064364
}
}Tags
x402
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