x402 census · api.delx.ai · 4da484d4a7ef · JSON

POST /api/v1/x402/x402-delivery-content-type-check

live

X402 Delivery Content Type Check: compares delivery content type with buyer-accepted media types using only bounded caller-supplied values. Call when you need a bounded x402 delivery content type check result before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons…

Verdict: live. The unpaid GET reached a valid 402. The live amount equals the catalog price.

Facts from the catalogs

Field Value

URL https://api.delx.ai/api/v1/x402/x402-delivery-content-type-check

Method POST

Price $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp

payTo 0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2

Seller api.delx.ai

Catalogs cdp (row updated 2026-09-19), payai (row updated 2026-08-27)

Listed since (lower bound) 2026-08-27 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-19

CDP quality counters 2 calls and 1 unique payers in 30 days, last call 2026-09-19 (catalog-reported, not verified on chain)

Category (keyword rule) agent-services

Templated path no

x402Version in catalog 2

Service name / tags X402 Delivery Content Type Check · x402, delivery, contract

Unpaid probe (census of 2026-09-30)

Field Value

Probed at 2026-09-30T23:19:57.270Z

HEAD 404

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in body

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"1000","payTo":"0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Live payTo equals catalog payTo yes

extensions.bazaar in the 402 yes

PAYMENT-REQUIRED header no

WWW-Authenticate offer Payment id="xdShvXb_Jsvi6fKU0NYBto1gID_v

Content type / server / CORS application/json / n/a / *

Latency 6,915 ms

Error Payment required: $0.001 USDC for util_x402_delivery_content_type_check

No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.

On-chain facts for the payTo (public address)

Field Value

Distinct payers 18

Payments 39

USDC volume $0.14

Median payment $0.001

First / last payment 2026-08-06 / 2026-09-30

Sampler-shaped share of payments 94.9%

Payers that are not samplers 1

Source forensics-2026-09-30

Address 0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2 (contract: EIP7702StatelessDeleGator)

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "accepted": [
    "application/json"
   ],
   "content_type": "application/json; charset=utf-8"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "evidence": {
    "external_calls": 0,
    "input_sha256": "17d22f796e7932f46bbb49530f843fcbb42e7bea6267a2306a495865b24fc926",
    "retained": false
   },
   "operation": "delivery_contract:x402_delivery_content_type_check",
   "result": {
    "accepted": true,
    "content_type": "application/json"
   },
   "schema": "delx/util-x402-delivery-content-type-check/v1",
   "status": "pass"
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://api.delx.ai/api/v1/x402/x402-delivery-content-type-check' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'

The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.

Paid checks (x402, USDC on Base)

GET https://bazaar.agentexchange.work/r/4da484d4a7ef/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"4da484d4a7ef"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.

Catalog references: PayAI listing status · agentic.market (CDP Bazaar front end) · this record as JSON · all resources on api.delx.ai.