x402 version compatibility audit derived

api.zfinia.comInference derived

POST https://api.zfinia.com/x402/v1/x402-version-compatibility-audit

passabsent from every registry#6 by calls of 15 on this host

0.11 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 2026-10-04 21:22 UTC · method

Validation state: pass; as of 2026-10-04 13:40 UTC · method · sweep daily-2026-10-04
Uptime, 7 / 30 / 90 days: — / 50% / 50%; as of 2026-10-04 13:40 UTC · method · 0 of 0 in 7d, 1 of 2 in 30d, 1 of 2 in 90d
Calls, trailing 30 days: 1; as of 2026-10-04 21:22 UTC · method
Unique payers, trailing 30 days: 1; as of 2026-10-04 21:22 UTC · method
Last called: 2026-10-04 08:06 UTC; as of 2026-10-04 21:22 UTC · method
First observed by TOLLderived: 2026-10-04; as of 2026-10-04 12:19 UTC · method · observation began 10 September 2026; listings that predate it show that date
Pricederived: 0.11 USDC; as of 2026-10-04 21:22 UTC · method · on eip155:8453
Networks: 1; as of 2026-10-04 21:22 UTC · method

Counters

2 observations, 1 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 3,584 endpoints in Inference that carry counters, binned on a logarithmic scale because the range runs over five orders of magnitude. The marked bin is this endpoint, at 1: 2,378 in the category are counted higher and 1,205 lower.

No trace is drawn of this endpoint’s own volume. Its counters have changed 1 time across 2 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

x402 version compatibility audit is one of 15 listed endpoints on api.zfinia.com, tied 6th by calls with 10 others among them.

x402 version compatibility audit takes a json body with the fields challenges and supported_versions.

A response from x402 version compatibility audit, as declared, includes limits, passed, complete, findings, by_version, consistent and 2 others.

x402 version compatibility audit drew a single call from a single payer in the trailing 30 days.

The last call to x402 version compatibility audit came 28 days before the snapshot, 2026-10-04.

On Base, x402 version compatibility audit asks 0.11 USDC per call.

It accounts for 3% of the calls counted across the host.

TOLL files x402 version compatibility audit under inference: a POST endpoint on api.zfinia.com, listed in neither registry at the last pull.

x402 version compatibility audit answered the sweep of 2026-10-04 with a valid 402, passing 1 of 2 sweeps since 2026-10-04.

Closest in price to x402 version compatibility audit within inference: agent call at api.losbeto.xyz and answer at agent402.tools.

Among comparable prices in inference, x402 version compatibility audit sits above 90% of them.

The wallet paid by x402 version compatibility audit is the payee of 179 endpoints across 5 hosts.

Seller tags: x402, machine payments, protocol version and compatibility.

x402 version compatibility audit was missing from the Coinbase registry at the pull of 2026-10-05, confirmed at the pull of 2026-10-05; that is registry presence, not liveness.

Where the sentences above compare this endpoint with others, the comparison is against the index as it stands now, live; the figures above are final.

Payment options as declared

the payment options, as of 2026-10-04 21:22 UTC · method

Every payment option declared on this listing
registry	network	asset	amount	scheme	pay to
Coinbase	eip155:8453	USDC	0.11 USDC	exact	0x25e824…6a9608

Preflight checks at the last sweep

the checks, as of 2026-10-04 13:40 UTC · methodendpoint 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	failed checks	sweep
2026-10-04 13:40 UTC	pass	0	daily-2026-10-04
2026-10-04 12:45 UTC	fail	1	new-after-daily-2026-10-04

Registry presence

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

2026-10-05 14:34 UTCabsence from Coinbase confirmed, rule v1
2026-10-05 05:36 UTCabsent from Coinbase at this pull
2026-10-04 12:19 UTClisted in Coinbase

Declared input and output, as listed

From the registry record, not validated by TOLL.the declared schema, as of 2026-10-04 08:06 UTC · method

The input and output block

{
  "input": {
    "body": {
      "challenges": [
        {
          "url": "https://api.merchant.test/v1/score",
          "challenge": {
            "accepts": [
              {
                "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
                "payTo": "0xa1b2c30000000000000000000000000000009f8e",
                "amount": "5000",
                "scheme": "exact",
                "network": "eip155:8453"
              }
            ],
            "resource": {
              "url": "https://api.merchant.test/v1/score",
              "mimeType": "application/json",
              "description": "Paid resource at https://api.merchant.test/v1/score"
            },
            "extensions": {
              "bazaar": {
                "schema": {
                  "properties": {
                    "input": {
                      "type": "object"
                    },
                    "output": {
                      "type": "object"
                    }
                  }
                }
              }
            },
            "x402Version": 2
          }
        },
        {
          "url": "https://api.merchant.test/v1/old",
          "challenge": {
            "accepts": [
              {
                "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
                "payTo": "0xa1b2c30000000000000000000000000000009f8e",
                "amount": "1000",
                "scheme": "exact",
                "network": "eip155:8453"
              }
            ],
            "resource": {
              "url": "https://api.merchant.test/v1/old",
              "mimeType": "application/json",
              "description": "Paid resource at https://api.merchant.test/v1/old"
            },
            "extensions": {
              "bazaar": {
                "schema": {
                  "properties": {
                    "input": {
                      "type": "object"
                    },
                    "output": {
                      "type": "object"
                    }
                  }
                }
              }
            },
            "x402Version": 1
          }
        },
        {
          "url": "https://api.merchant.test/v1/unversioned",
          "challenge": {
            "accepts": [
              {
                "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
                "payTo": "0xa1b2c30000000000000000000000000000009f8e",
                "amount": "1000",
                "scheme": "exact",
                "network": "eip155:8453"
              }
            ],
            "resource": {
              "url": "https://api.merchant.test/v1/unversioned"
            }
          }
        }
      ],
      "supported_versions": [
        2
      ]
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "limits": {
        "maxAssets": 100,
        "maxAccepts": 20,
        "maxFindings": 500,
        "maxNetworks": 50,
        "maxResources": 500,
        "maxChallenges": 200
      },
      "passed": false,
      "complete": true,
      "findings": [
        {
          "code": "UNSUPPORTED_VERSION",
          "detail": "https://api.merchant.test/v1/old declares version 1 and this client supports 2.",
          "resource": "https://api.merchant.test/v1/old",
          "challenge": 1
        },
        {
          "code": "VERSION_NOT_DECLARED",
          "detail": "https://api.merchant.test/v1/unversioned declares no x402Version, so how to read the rest of the challenge is a guess.",
          "challenge": 2
        },
        {
          "code": "MULTIPLE_VERSIONS_IN_USE",
          "detail": "The set spans x402 versions 1 and 2, so a client calling all of them must implement each."
        }
      ],
      "by_version": [
        {
          "version": "1",
          "resources": [
            "https://api.merchant.test/v1/old"
          ],
          "challenges": 1
        },
        {
          "version": "2",
          "resources": [
            "https://api.merchant.test/v1/score"
          ],
          "challenges": 1
        },
        {
          "version": "none",
          "resources": [
            "https://api.merchant.test/v1/unversioned"
          ],
          "challenges": 1
        }
      ],
      "consistent": false,
      "request_id": "example-request",
      "service_id": "x402_version_compatibility_audit",
      "assumptions": [
        "Nothing is fetched and nothing is paid.",
        "A challenge with no declared version is reported separately from one declaring an unsupported version, because the first means the rest of the challenge cannot be read reliably at all."
      ],
      "limitations": [
        "Version distribution across the challenges supplied. Whether a version will remain in use is not knowable here.",
        "consistent is true only when every challenge decoded, declared a version this client supports, and the set spans one version."
      ],
      "observed_at": "2026-10-02T00:00:00.000Z",
      "not_examined": [],
      "payment_sent": false,
      "finding_count": 3,
      "service_version": "1.0.0",
      "findings_by_code": {
        "UNSUPPORTED_VERSION": 1,
        "VERSION_NOT_DECLARED": 1,
        "MULTIPLE_VERSIONS_IN_USE": 1
      },
      "supported_versions": [
        2
      ],
      "distinct_version_count": 3,
      "decoded_challenge_count": 3,
      "supplied_challenge_count": 3
    }
  }
}

What the listing says

Find out which x402 versions you are actually dealing with across a set of sellers. Reports challenges declaring a version you do not support, challenges declaring no version at all - where how to read the rest is a guess - and a set spanning more than one version, which means your client must implement each of them at once. Nothing is paid.

the record, 2026-10-04 08:06 UTC · method

As declared

POST
eip155:8453
USDC
exact

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

Who is paid

0x25e824…6a9608

Takes payment for 179 endpoints on 5 hosts.

Among Inference

counted above0%

of 3,584 that carry counters

cheaper than90%

of 3,587 with a comparable price

3,681 endpoints are in this category.

the comparison, 2026-11-01 05:59 UTC · method · live

Nearest on price

agent callapi.losbeto.xyz0.1 USDCpass
answeragent402.tools0.08 USDCpass
perplexity chatperplexity.x402.paywithlocus.com0.153 USDCpass
midas ops premiummidax402.com0.07 USDCmalformed
translateapi.strale.io0.054 USDClegacy v1

Same category, nearest declared price, one per payee wallet (method). the list, 2026-11-01 05:59 UTC · method · live

Elsewhere in the record

Cite this page

This endpoint is delisted: the page is frozen at its last observation and its live URL is the stable one. Data reuse is under CC BY 4.0 (terms).

Plain text

TOLL, "x402 version compatibility audit on api.zfinia.com". https://tollindex.com/e/api-zfinia-com-x402-v1-x402-version-compatibility-audit-b4cf54. Accessed [access date].

BibTeX

@misc{toll-e-api-zfinia-com-x402-v1-x402-version-compatibility-audit-b4cf54-2026-11-01,
  author = {TOLL},
  title = {x402 version compatibility audit on api.zfinia.com},
  howpublished = {\url{https://tollindex.com/e/api-zfinia-com-x402-v1-x402-version-compatibility-audit-b4cf54}},
  year = {2026},
  month = {11},
  note = {Frozen at its last observation, 2026-11-01 05:59 UTC. Accessed [access date].}
}

Reports and replies about this endpoint

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Report an error about x402 version compatibility audit, or reply as the named seller