api.duoleads.com

https://api.duoleads.com/v1/chain/selector

Shares a payout wallet with 32 other endpoints — its adoption is attributed from that shared wallet's traffic, not earned exclusively.

Compute the Keccak-256 hash of a Solidity function or event signature and derive the 4-byte function selector and the 32-byte event topic. Normalises the signature first — strips parameter names, expands uint to uint256 and the other aliases, flattens tuples — so a signature copied from source code produces the same selector as the canonical form. Also hashes arbitrary text or hex bytes with Keccak-256.

58
reliability

Reliability & health

Uptime and response time from our own unpaid probes, plus the reliability score built from them.

7 days 30 days

Uptime

100.0% avg
0% 50% 100% Sep 29Oct 1Oct 3Oct 5

Response time

p50 9ms · p95 20ms
0ms 50ms 100ms Sep 29Oct 1Oct 3Oct 5
Data table
Reliability history per time bucket over the last 30 days (daily).
Bucket Uptime Probes Response time
9/29/2026, 12:00:00 AM 100% 8 7ms
9/30/2026, 12:00:00 AM 100% 12 10ms
10/1/2026, 12:00:00 AM 100% 12 8ms
10/2/2026, 12:00:00 AM 100% 12 14ms
10/3/2026, 12:00:00 AM 100% 13 8ms
10/4/2026, 12:00:00 AM 100% 10 8ms
10/5/2026, 12:00:00 AM 100% 6 8ms
58
Composite reliability — the weighted average of the dimensions below, on a 0–100 scale.
Availability
100

How often it was reachable when we probed it (weight 35%).

Latency
100

How quickly it answers when it is up — fast scores high (weight 20%).

Security
100

Whether it serves over working TLS / https (weight 15%).

Transparency
61

Whether the operator disclosed what it does — description, schema, identity (weight 15%).

Activity
1

Observed on-chain payments to this endpoint's wallet — transactions, volume, and distinct paying wallets over the last month (weight 15%; not yet measured when we have not seen its wallet settle).

Confidence 100% — how much probe evidence backs this score. A thin history is flagged, not hidden.

See the scoring methodology for exactly how each number is computed.

Payment

Currencies
USDC
Networks
base
Facilitator
unknown
SDK
unknown

Operator

Company
inferred — unknown
Jurisdiction
—
Registrar
Key-Systems GmbH
Domain registered
2020-10-29
Hosting network
CLOUDFLARENET
Hosting country
—

Operator context is derived from public RDAP/TLS records and unverified. Company and country are only available for endpoints that publish them (an OV/EV TLS certificate or a non-redacted domain record); most endpoints are CDN-fronted and disclose neither.

On-chain activity (base)

138
payments (30d)
6.9
USD volume (30d)
2
paying wallets (30d)

Payments per day

last payment 10/2/2026
0 30 60 Sep 28Sep 29Oct 1Oct 2
Data table
Settled payments per day.
Day Payments Volume (USD) Paying wallets
9/28/2026 49 2.45 1
9/29/2026 55 2.75 1
10/1/2026 33 1.65 1
10/2/2026 1 0.05 1

This payout wallet is shared: figures cover all 33 endpoints paid at it, since payments cannot be attributed to one of them. Only payments settled on chains and facilitators we index.

Linked by wallet — likely same operator

On-chain agent identity and the x402 endpoint that shares its settlement wallet.

https://api.duoleads.com/v1/code/semver x402 endpoint https://api.duoleads.com/v1/time/dst x402 endpoint https://api.duoleads.com/v1/ref/airport x402 endpoint https://api.duoleads.com/v1/num/allocate x402 endpoint https://api.duoleads.com/v1/geo/geohash x402 endpoint https://api.duoleads.com/v1/chain/address x402 endpoint https://api.duoleads.com/v1/ref/country x402 endpoint https://api.duoleads.com/v1/num/stats x402 endpoint https://api.duoleads.com/v1/time/business-days x402 endpoint https://api.duoleads.com/v1/code/url x402 endpoint https://api.duoleads.com/v1/text/transliterate x402 endpoint https://api.duoleads.com/v1/ref/nuts x402 endpoint https://api.duoleads.com/v1/code/idn x402 endpoint https://api.duoleads.com/v1/id/national x402 endpoint https://api.duoleads.com/v1/num/radix x402 endpoint https://api.duoleads.com/v1/code/hash x402 endpoint https://api.duoleads.com/v1/geo/polygon x402 endpoint https://api.duoleads.com/v1/text/similarity x402 endpoint https://api.duoleads.com/v1/id/iban x402 endpoint https://api.duoleads.com/v1/id/iban-build x402 endpoint https://api.duoleads.com/v1/code/jwt x402 endpoint https://api.duoleads.com/v1/geo/pluscode x402 endpoint https://api.duoleads.com/v1/text/unicode x402 endpoint https://api.duoleads.com/v1/geo/distance x402 endpoint https://api.duoleads.com/v1/time/rrule x402 endpoint https://api.duoleads.com/v1/id/security x402 endpoint https://api.duoleads.com/v1/time/zone x402 endpoint https://api.duoleads.com/v1/text/slug x402 endpoint https://api.duoleads.com/v1/id/gs1 x402 endpoint https://api.duoleads.com/v1/time/calendar x402 endpoint https://api.duoleads.com/v1/num/words x402 endpoint https://api.duoleads.com/v1/ref/currency x402 endpoint
Response schema 
{
  "properties": {
    "data": {
      "description": "canonical (string|null, null in data mode), keccak256 (0x + 32 bytes), selector (0x + 4 bytes; string|null, null for kind=event and in data mode), topic0 (0x + 32 bytes; string|null, null for kind=function or error and in data mode), inputs ([] or null, null in data mode), normalisations [{from, to}]. Data mode (data= instead of signature, hashing arbitrary text or hex bytes with Keccak-256): canonical, selector, topic0 and inputs are null, normalisations is empty, and encoding (utf8|hex) and input_bytes (integer) are added.",
      "properties": {
        "canonical": {
          "type": [
            "string",
            "null"
          ]
        },
        "encoding": {
          "type": "string"
        },
        "input_bytes": {
          "type": "integer"
        },
        "inputs": {
          "items": {
            "type": "string"
          },
          "type": [
            "array",
            "null"
          ]
        },
        "keccak256": {
          "type": "string"
        },
        "normalisations": {
          "items": {
            "properties": {
              "from": {
                "type": "string"
              },
              "to": {
                "type": "string"
              }
            },
            "required": [
              "from",
              "to"
            ],
            "type": "object"
          },
          "type": "array"
        },
        "selector": {
          "type": [
            "string",
            "null"
          ]
        },
        "topic0": {
          "type": [
            "string",
            "null"
          ]
        }
      },
      "required": [
        "canonical",
        "keccak256",
        "selector",
        "topic0",
        "inputs",
        "normalisations"
      ],
      "type": "object"
    },
    "meta": {
      "$ref": "#/components/schemas/Meta"
    },
    "ok": {
      "const": true
    },
    "route": {
      "const": "/v1/chain/selector"
    },
    "version": {
      "const": "1.0.0"
    }
  },
  "required": [
    "ok",
    "route",
    "version",
    "data",
    "meta"
  ],
  "type": "object"
}