x402 census · phion.systems · b3021495a2e1 · JSON

POST /v1/paid/fetch-evidence

live

Independent, prompt-injection-screened, hashed and signed web evidence for AI agents

Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-02).

Facts from the catalogs

Field Value

URL https://phion.systems/v1/paid/fetch-evidence

Method POST

Price $0.004 USDC = 4000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts eip155:137, eip155:42161, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp

payTo 0x7BEcA68DD9aC733D4de6b16d16B85Dc391c071e2

Seller phion.systems

Catalogs cdp (row updated 2026-09-13), payai (row updated 2026-09-11)

Listed since (lower bound) 2026-09-11 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-13

CDP quality counters 2 calls and 2 unique payers in 30 days, last call 2026-09-13 (catalog-reported, not verified on chain)

Category (keyword rule) other/unknown

Templated path no

x402Version in catalog 2

Service name / tags none

Unpaid probe (census of )

Field

Value

Probe

not probed in this build

Latest re-probe

Field Value

Re-probed at 2026-10-02T16:13:27.000Z (cron)

Verdict now live changed from unprobed

HEAD / GET 402 / 402

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"4000","payTo":"0x7BEcA68DD9aC733D4de6b16d16B85Dc391c071e2","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":600,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Latency 2,700 ms

Error none

On-chain facts for the payTo (public address)

Field Value

Distinct payers 1

Payments 1

USDC volume $0.001

Median payment $0.001

First / last payment 2026-09-17 / 2026-09-17

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x7BEcA68DD9aC733D4de6b16d16B85Dc391c071e2

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "url": "https://example.com"
  },
  "bodyType": "json",
  "discoverable": true,
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "evidence": {
    "observation": "independently_fetched",
    "prompt_injection": {
     "detected": false,
     "risk": "low"
    },
    "raw_sha256": "hex"
   },
   "receipt": {
    "signature": "base64url"
   }
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://phion.systems/v1/paid/fetch-evidence' -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/b3021495a2e1/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"b3021495a2e1"} 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 phion.systems.