source derived

chain.openverbs.comIdentity derived

POST https://chain.openverbs.com/v1/source

passlisted in Coinbase#23 by calls of 27 on this host

0.006 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 2026-10-13 14:08 UTC · method · pinnable

Validation state: pass; as of 2026-10-16 10:39 UTC · method · pinnable · sweep daily-2026-10-16
Uptime, 7 / 30 / 90 days: 100% / 100% / 100%; as of 2026-10-16 10:39 UTC · method · pinnable · 6 of 6 in 7d, 14 of 14 in 30d, 14 of 14 in 90d
Calls, trailing 30 days: 3; as of 2026-10-13 14:08 UTC · method · pinnable
Unique payers, trailing 30 days: 1; as of 2026-10-13 14:08 UTC · method · pinnable
Last called: 2026-10-06 17:00 UTC; as of 2026-10-13 14:08 UTC · method · pinnable
First observed by TOLLderived: 2026-10-03; as of 2026-10-03 21:12 UTC · method · pinnable · observation began 10 September 2026; listings that predate it show that date
Pricederived: 0.006 USDC; as of 2026-10-13 14:08 UTC · method · pinnable · on eip155:8453
Networks: 1; as of 2026-10-13 14:08 UTC · method · pinnable

Counters

27 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 2,150 endpoints in Identity that carry counters, binned on a logarithmic scale because the range runs over five orders of magnitude. The marked bin is this endpoint, at 3: 593 in the category are counted higher and 1,556 lower.

No trace is drawn of this endpoint’s own volume. Its counters have changed 2 times across 27 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

Among the 27 endpoints on chain.openverbs.com, source is tied 23rd by calls with 3 others.

Requests carry a json body with the fields chain and address.

source returns json; the example shows chain, stale, address, chainId, sources, compiler and 2 others.

One payer accounts for all 3 calls to source over 30 days.

The most recent call was 7 days before the snapshot.

A call to source costs 0.006 USDC on Base, as declared.

3% of the host's counted calls go to it.

source is a POST endpoint at chain.openverbs.com, listed in the Coinbase registry and filed by TOLL under identity.

source answered the sweep of 2026-10-16 with a valid 402, as at every sweep since 2026-10-03.

Closest in price to source within identity: by username at x402.twit.sh and my usage at agent402.tools.

Among comparable prices in identity, source sits above 32% of them.

Within identity, 57% of endpoints with counters have fewer calls.

The wallet paid by source is the payee of 411 endpoints across 91 hosts.

The seller's own tags are contract source code, get source code, verified source and solidity source.

Payment options as declared

the payment options, as of 2026-10-13 14:08 UTC · method · pinnable

Every payment option declared on this listing
registry	network	asset	amount	scheme	pay to
Coinbase	eip155:8453	USDC	0.006 USDC	exact	0xb3f4de…C2194A

Preflight checks at the last sweep

the checks, as of 2026-10-16 10:39 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
2026-10-16 10:39 UTC	pass	daily-2026-10-16
2026-10-15 12:39 UTC	pass	daily-2026-10-15
2026-10-14 10:30 UTC	pass	daily-2026-10-14
2026-10-13 15:51 UTC	pass	daily-2026-10-13
2026-10-12 12:58 UTC	pass	daily-2026-10-12
2026-10-11 11:34 UTC	pass	daily-2026-10-11
2026-10-10 19:40 UTC	pass	daily-2026-10-10
2026-10-09 13:59 UTC	pass	daily-2026-10-09
2026-10-08 15:20 UTC	pass	daily-2026-10-08
2026-10-07 14:37 UTC	pass	daily-2026-10-07
2026-10-06 16:41 UTC	pass	daily-2026-10-06
2026-10-05 13:03 UTC	pass	daily-2026-10-05
2026-10-04 15:26 UTC	pass	daily-2026-10-04
2026-10-03 22:03 UTC	pass	new-after-daily-2026-10-03

Registry presence

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

2026-10-03 21:12 UTClisted in Coinbase

Declared input and output, as listed

From the registry record, not validated by TOLL.the declared schema, as of 2026-10-06 17:00 UTC · method · live

The input and output block

{
  "input": {
    "body": {
      "chain": "ethereum",
      "address": "0x0000000000000000000000000000000000000001"
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "chain": "ethereum",
      "stale": false,
      "address": "0x0000000000000000000000000000000000000001",
      "chainId": 1,
      "sources": [],
      "compiler": null,
      "language": null,
      "settings": null,
      "verified": false,
      "fileCount": 0,
      "matchType": null,
      "truncated": false,
      "totalBytes": 0,
      "verifiedAt": null,
      "contractName": null,
      "fullyQualifiedName": null
    }
  }
}

What the listing says

Get the verified Solidity/Vyper source code for a deployed contract by address, sourced from Sourcify. Returns every source file (path + content), the contract name, language, compiler version and compiler settings (optimizer, evmVersion) — the full human-readable source an agent needs to read, audit or feed to an LLM. Supports Ethereum, Base, Arbitrum, Optimism, Polygon. Unverified contracts return `verified:false`. Live reads with cache fallback.

the record, 2026-10-06 17:00 UTC · method · pinnable

As declared

POST
eip155:8453
USDC
exact

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

Who is paid

0xb3f4de…C2194A

Takes payment for 411 endpoints on 91 hosts.

Among Identity

counted above57%

of 2,150 that carry counters

cheaper than32%

of 2,153 with a comparable price

2,199 endpoints are in this category. 17 declare exactly this price.

the comparison, 2026-10-13 14:08 UTC · method · live

Nearest on price

meadowagent.pocket.network0.005 USDCpass
chain ensapi.onesource.io0.005 USDCmalformed
by usernamex402.twit.sh0.005 USDCpass
my usageagent402.tools0.005 USDCpass
screensanctions.cyberwarex.com0.005 USDCpass

Same category, nearest declared price, one per payee wallet (method). the list, 2026-10-13 14:08 UTC · method · live

Elsewhere in the record

Cite this page

The pinned URL below renders this page from the snapshot of 2026-10-13 14:08 UTC and does not change; the live page does, every six hours. Data reuse is under CC BY 4.0 (terms).

Plain text

TOLL, "source on chain.openverbs.com", snapshot of 2026-10-13 14:08 UTC. https://tollindex.com/e/chain-openverbs-com-v1-source-ff17a2/at/2026-10-13T14-08Z. Accessed [access date].

BibTeX

@misc{toll-e-chain-openverbs-com-v1-source-ff17a2-2026-10-13T14-08Z,
  author = {TOLL},
  title = {source on chain.openverbs.com},
  howpublished = {\url{https://tollindex.com/e/chain-openverbs-com-v1-source-ff17a2/at/2026-10-13T14-08Z}},
  year = {2026},
  month = {10},
  note = {Pinned view of the snapshot of 2026-10-13 14:08 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 source, or reply as the named seller