api.relai.fi

Name: api.relai.fi
Price: 1.15 USDC
Availability: InStock

Detects and analyzes MEV activity—sandwich attacks, front-running and toxic flows—across major chains using AI-powered analysis.

OtherLiveeip155:8453Exactvia facilitator:dexter

https://api.relai.fi/relay/1769629274857/x402/bitquery/mevdetection

Settlements · 30d

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.

$724.35

Verified settled volume

1,025 settlements proven x402 by their on-chain EIP-3009 marker.

$1.15

Listed price

As published in the catalog. Always read the live 402 before paying.

—

Calls · 30d

Upstream's own call count for this endpoint, not ours.

—

Unique payers · 30d

Never called

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xc9368b30BD620164FD1a05a5d99dcaf8Ae754775

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

AgentEinsteinERC-8004

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "X-PAYMENT header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xc9368b30BD620164FD1a05a5d99dcaf8Ae754775",
      "amount": "600000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://emc2ai.io/x402/bitquery/mevdetection",
      "description": "Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)",
      "discoverable": true,
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "bodyFields": {
            "chain": {
              "enum": [
                "base",
                "ethereum",
                "bsc",
                "arbitrum",
                "polygon",
                "optimism",
                "solana"
              ],
              "type": "string",
              "description": "Blockchain to query (e.g., base, ethereum, bsc, solana)"
            },
            "limit": {
              "type": "string",
              "description": "Maximum number of results to return (default: 10, max: 500)"
            },
            "timeperiod": {
              "enum": [
                "1h",
                "4h",
                "24h",
                "7d",
                "30d"
              ],
              "type": "string",
              "description": "Time period for analysis (e.g., 1h, 24h, 7d, 30d)"
            }
          },
          "discoverable": true
        },
        "output": {
          "result": {
            "type": "object",
            "description": "Query result data"
          },
          "status": {
            "type": "string",
            "description": "Request status (completed or error)"
          },
          "payment": {
            "type": "object",
            "description": "Payment receipt information"
          },
          "analysis": {
            "type": "object",
            "description": "AI-powered analysis and insights"
          }
        }
      },
      "maxAmountRequired": "600000",
      "maxTimeoutSeconds": 90
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "mint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "chain": "solana"
      },
      "payTo": "3H8oRdbRf18b2aaMVBfgJVDhnjhiXjCVTP5ZnNmPuikb",
      "amount": "600000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "mimeType": "application/json",
      "resource": "https://emc2ai.io/x402/bitquery/mevdetection",
      "description": "Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)",
      "maxAmountRequired": "600000",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "sat",
      "extra": {
        "chain": "lightning",
        "merchantId": "520ca7be-8ffe-4b50-ba8a-c1d8d6c2141a",
        "usdEquivalent": "0.60"
      },
      "payTo": "520ca7be-8ffe-4b50-ba8a-c1d8d6c2141a",
      "amount": "793",
      "scheme": "exact",
      "network": "lightning:mainnet",
      "mimeType": "application/json",
      "resource": "https://emc2ai.io/x402/bitquery/mevdetection",
      "description": "Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)",
      "maxAmountRequired": "793",
      "maxTimeoutSeconds": 30
    }
  ],
  "resource": {
    "url": "https://emc2ai.io/x402/bitquery/mevdetection",
    "mimeType": "application/json",
    "description": "Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)"
  },
  "extensions": {
    "bazaar": {
      "schema": {
        "properties": {
          "input": {
            "properties": {
              "body": {
                "type": "object",
                "properties": "[Circular Reference]"
              }
            }
          },
          "output": {
            "properties": {
              "example": {
                "result": {},
                "status": "completed",
                "analysis": {}
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

1.15USDC≈ $1.15 USD

on Base · exact scheme

Pay 1.15 USDC on Base to 0xc936…54775. The signed payment is good for 1.5 minutes.

Paid to: 0xc936…54775
USD Coin contract: 0x8335…02913
Payment window: 1.5 minutes
As published: 1150000 smallest units
Buys: Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)
Returns: application/json

1150000units

on solana · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 3H8oRd…Puikb
Token contract: EPjFWd…TDt1v
Payment window: 1 minute
Buys: Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)
Returns: application/json

1462units

on lightning:mainnet · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 520ca7…2141a
Token contract: sat
Payment window: 30 seconds
Buys: Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)
Returns: application/json

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc9368b30BD620164FD1a05a5d99dcaf8Ae754775",
    "scheme": "exact",
    "network": "base",
    "mimeType": "application/json",
    "resource": "https://emc2ai.io/x402/bitquery/mevdetection",
    "description": "Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)",
    "discoverable": true,
    "outputSchema": {
      "input": {
        "type": "http",
        "method": "POST",
        "bodyType": "json",
        "bodyFields": {
          "chain": {
            "enum": [
              "base",
              "ethereum",
              "bsc",
              "arbitrum",
              "polygon",
              "optimism",
              "solana"
            ],
            "type": "string",
            "description": "Blockchain to query (e.g., base, ethereum, bsc, solana)"
          },
          "limit": {
            "type": "string",
            "description": "Maximum number of results to return (default: 10, max: 500)"
          },
          "timeperiod": {
            "enum": [
              "1h",
              "4h",
              "24h",
              "7d",
              "30d"
            ],
            "type": "string",
            "description": "Time period for analysis (e.g., 1h, 24h, 7d, 30d)"
          }
        },
        "discoverable": true
      },
      "output": {
        "result": {
          "type": "object",
          "description": "Query result data"
        },
        "status": {
          "type": "string",
          "description": "Request status (completed or error)"
        },
        "payment": {
          "type": "object",
          "description": "Payment receipt information"
        },
        "analysis": {
          "type": "object",
          "description": "AI-powered analysis and insights"
        }
      }
    },
    "maxAmountRequired": "1150000",
    "maxTimeoutSeconds": 90
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "mint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "chain": "solana"
    },
    "payTo": "3H8oRdbRf18b2aaMVBfgJVDhnjhiXjCVTP5ZnNmPuikb",
    "scheme": "exact",
    "network": "solana",
    "mimeType": "application/json",
    "resource": "https://emc2ai.io/x402/bitquery/mevdetection",
    "description": "Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)",
    "maxAmountRequired": "1150000",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "sat",
    "extra": {
      "chain": "lightning",
      "merchantId": "520ca7be-8ffe-4b50-ba8a-c1d8d6c2141a",
      "usdEquivalent": "1.15"
    },
    "payTo": "520ca7be-8ffe-4b50-ba8a-c1d8d6c2141a",
    "scheme": "exact",
    "network": "lightning:mainnet",
    "mimeType": "application/json",
    "resource": "https://emc2ai.io/x402/bitquery/mevdetection",
    "description": "Detect MEV activity: sandwich attacks, front-running, toxic flow analysis. (with AI analysis)",
    "maxAmountRequired": "1462",
    "maxTimeoutSeconds": 30
  }
]

Provenance

Seen in the source catalog: 2026-09-19 08:32Z
Last indexed by Roundhouse: 2026-09-20 12:45Z
Last enriched (probe, favicon, geo): 2026-09-16 21:15Z
x402 version: 2
Max timeout: 90s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service api.relai.fi and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=api.relai.fi'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.relai.fi/relay/1769629274857/x402/bitquery/mevdetection, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.