chain selector derived

api.duoleads.comMarket data derived

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

passlisted in Coinbase#3 by calls of 33 on this host

0.05 USDC

per call, as the listing declares it on eip155:8453

Compare with another Every figure as JSON Cite this page

the price, as of 2026-10-02 05:34 UTC · method · pinnable

Validation state: pass; as of 2026-09-30 06:58 UTC · method · pinnable · sweep daily-2026-09-30
Uptime, 7 / 30 / 90 days: 100% / 100% / 100%; as of 2026-09-30 06:58 UTC · method · pinnable · 3 of 3 in 7d, 3 of 3 in 30d, 3 of 3 in 90d
Calls, trailing 30 days: 2; as of 2026-10-02 05:34 UTC · method · pinnable
Unique payers, trailing 30 days: 1; as of 2026-10-02 05:34 UTC · method · pinnable
Last called: 2026-10-01 20:52 UTC; as of 2026-10-02 05:34 UTC · method · pinnable
First observed by TOLLderived: 2026-09-29; as of 2026-09-29 05:42 UTC · method · pinnable · observation began 10 September 2026; listings that predate it show that date
Pricederived: 0.05 USDC; as of 2026-10-02 05:34 UTC · method · pinnable · on eip155:8453
Networks: 1; as of 2026-10-02 05:34 UTC · method · pinnable

Counters

7 observations, 2 of them a change, fewer than the 3 a trace needs

How big is this endpoint among the ones like it?

Calls counted in the trailing thirty days across the 6,340 endpoints in Market data that carry counters, binned on a logarithmic scale because the range runs over five orders of magnitude. The marked bin is this endpoint, at 2: 2,432 in the category are counted higher and 3,907 lower.

No trace is drawn of this endpoint’s own volume. Its counters have changed 2 times across 7 observations, and 3 changes are the fewest this site will draw a trace through, because two points and a guess are not a series. Every observation is in the JSON.

In words

It disappeared from the registry on 2026-10-01 and returned on 2026-10-01.

TOLL files chain selector under market data: a GET endpoint on api.duoleads.com, listed in the Coinbase registry.

On Base, chain selector asks 0.05 USDC per call.

Requests carry the query parameter signature.

chain selector answered the sweep of 2026-09-30 with a valid 402, as at every sweep since 2026-09-29.

A response from chain selector, as declared, includes ok, data, meta, route and version.

api.duoleads.com lists 33 endpoints; chain selector is tied 3rd by calls with 30 others.

It accounts for 2% of the calls counted across the host.

chain selector drew 2 calls from one payer in the trailing 30 days.

The last call to chain selector came on the day of the snapshot, 2026-10-01.

Closest in price to chain selector within market data: send token at keyring-agent.blockchhub.link and distribution balance exchanges relative at x402.glassnode.com.

chain selector is priced above 83% of comparable listings in market data.

The wallet paid by chain selector is the payee of 33 endpoints on one host.

The seller's tags on chain selector are deterministic, no-api-key, chain and blockchain.

442 other listings in market data declare exactly the same price.

Payment options as declared

the payment options, as of 2026-10-02 05:34 UTC · method · pinnable

Every payment option declared on this listing
registry	network	asset	amount	scheme	pay to
Coinbase	eip155:8453	USDC	0.05 USDC	exact	0xCD673f…6b3A39

Preflight checks at the last sweep

the checks, as of 2026-09-30 06:58 UTC · method · pinnableendpoint answered HTTP 402

No named check failed.

Validation history, 90 days

Every sweep that observed this endpoint, newest first.

Validation observations over the last 90 days
observed, UTC	state	sweep
2026-09-30 06:58 UTC	pass	daily-2026-09-30
2026-09-29 19:16 UTC	pass	daily-2026-09-29
2026-09-29 17:49 UTC	pass	new-after-daily-2026-09-28

Registry presence

Presence in a registry, not liveness of the service (method). Newest first.

2026-10-01 22:40 UTCback in Coinbase
2026-10-01 13:10 UTCabsence from Coinbase confirmed, rule v1
2026-10-01 05:50 UTCabsent from Coinbase at this pull
2026-09-29 05:42 UTClisted in Coinbase

Declared input and output, as listed

From the registry record, not validated by TOLL.the declared schema, as of 2026-10-01 20:52 UTC · method · live

The input and output block

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "signature": "transfer(address,uint256)"
    }
  },
  "output": {
    "type": "json",
    "example": {
      "ok": true,
      "data": {
        "inputs": [
          "address",
          "uint256"
        ],
        "topic0": null,
        "selector": "0xa9059cbb",
        "canonical": "transfer(address,uint256)",
        "keccak256": "0xa9059cbb2ab09eb219583f4a59a5d0623ade346d962bcd4e46b11da047c9049b",
        "normalisations": []
      },
      "meta": {
        "price_usd": "0.05",
        "disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
        "request_id": "01K6B7Q4ZC8H3F2M9WXR5TYN0D",
        "computed_at": "2026-09-28T12:00:00.000Z",
        "deterministic": true
      },
      "route": "/v1/chain/selector",
      "version": "1.0.0"
    }
  }
}

What the listing says

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.

the record, 2026-10-01 20:52 UTC · method · pinnable

As declared

GET
eip155:8453
USDC
exact

Every tag is a field on the listing, not a keyword TOLL assigned.

Who is paid

0xCD673f…6b3A39

Takes payment for 33 endpoints on 1 host.

Among Market data

counted above36%

of 6,340 that carry counters

cheaper than83%

of 6,359 with a comparable price

6,644 endpoints are in this category. 442 declare exactly this price.

the comparison, 2026-10-02 05:34 UTC · method · live

Nearest on price

send tokenkeyring-agent.blockchhub.link0.05 USDCpass
distribution balance exchanges relativex402.glassnode.com0.05 USDCpass
analyzesvm402.com0.03 USDCpass
stonk gems invokeapi.solenrich.com0.03 USDCpass
q verdict resourcewww.ax1.vc0.02 USDCpass

Same category, nearest declared price, one per payee wallet (method). the list, 2026-10-02 05:34 UTC · method · live

Elsewhere in the record

Cite this page

The pinned URL below renders this page from the snapshot of 2026-10-02 05:34 UTC and does not change; the live page does, every six hours. Data reuse is under CC BY 4.0 (terms).

Plain text

TOLL, "chain selector on api.duoleads.com", snapshot of 2026-10-02 05:34 UTC. https://tollindex.com/e/api-duoleads-com-v1-chain-selector-5aef96/at/2026-10-02T05-34Z. Accessed [access date].

BibTeX

@misc{toll-e-api-duoleads-com-v1-chain-selector-5aef96-2026-10-02T05-34Z,
  author = {TOLL},
  title = {chain selector on api.duoleads.com},
  howpublished = {\url{https://tollindex.com/e/api-duoleads-com-v1-chain-selector-5aef96/at/2026-10-02T05-34Z}},
  year = {2026},
  month = {10},
  note = {Pinned view of the snapshot of 2026-10-02 05:34 UTC. Accessed [access date].}
}

Reports and replies about this endpoint

None yet. Anything submitted through the form below is published here with its outcome.

Report an error about chain selector, or reply as the named seller