x402 census · api.delx.ai · 29efaeb0acb5 · JSON

POST /api/v1/x402/token-echo-1

live

Echo text with length (probe channel 1). Call when you verify x402 pay→deliver wiring with a trivial payload. Returns echo text, length, echo=1 for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

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/token-echo-1

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 2026-09-17), payai (row updated 2026-09-17)

Listed since (lower bound) 2026-09-17 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-17

CDP quality counters 2 calls and 2 unique payers in 30 days, last call 2026-09-17 (catalog-reported, not verified on chain)

Category (keyword rule) dev-tools/utilities

Templated path no

x402Version in catalog 2

Service name / tags Delx Token Echo 1 · x402, agents, local-first, micro-usdc, pay-per-call

Unpaid probe (census of 2026-09-30)

Field Value

Probed at 2026-09-30T23:19:44.119Z

HEAD 404

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in header+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 yes

WWW-Authenticate offer Payment id="3Bj4xCjIIz_4ANUcAJn7UrzmSE72

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

Latency 6,739 ms

Error Payment required: $0.001 USDC for util_token_echo_1

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": {
   "text": "ping-delx-1"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "echo": 1,
   "length": 11,
   "schema": "delx/util-token-echo-1/v1",
   "text": "ping-delx-1"
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://api.delx.ai/api/v1/x402/token-echo-1' -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/29efaeb0acb5/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"29efaeb0acb5"} 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.