x402 List

x402 Protocol Service Directory

SYNTHORA Stablecoin Supply

Data imported

payment-ready 2026-08-04, probe currently failing

imported from the x402 Bazaar, not submitted by the operator · own this service? claim it · or ask to be removed

Returns real-time circulating supply and per-chain breakdown for major stablecoins, sourced from DefiLlama.

Pay from $0.001 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

BASE URL https://stablecoin-mcap.hergertsynthora.com ENDPOINTS 1 NETWORK Base ASSET USDC MEMBER SINCE 2026-07-21 MONITORED SINCE 2026-07-21

ASSESSMENT

updated 4h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 90%
uptime 24h
0%
uptime 7d
0%
uptime 30d
90%
uptime 90d
90%
response p95
1965ms
avg response
1302ms
total checks
1,305

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14), stale (probe failing)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.001 (p9 in Data)
price (min)
$0.001
category percentile (min)
p9 in Data
endpoints / prices
1 / 1
model
flat
stability
0%
risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age
68d
registrar
IONOS SE
hosting
custom
domain created
2026-06-04

Identity facts, not a risk score.

traction ---

This service shares a payout address and its probe has been failing, so its on-chain volume is suppressed until it responds again. Settlements on a shared address while a member is down are not attributed to it.

CHANGES

7 events, detecting since 2026-07-24

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes price changed 9d ago (7 since 2026-07-24)

price changed · 9d ago

POST /service · eip155:8453 · USDC: 200001000

price changed · 12d ago

POST /service · eip155:8453 · USDC: 1000020000

price changed · 18d ago

POST /service · eip155:8453 · USDC: 300010000

price changed · 18d ago

POST /service · eip155:8453 · USDC: 100003000

price changed · 19d ago

POST /service · eip155:8453 · USDC: 100010000

price changed · 19d ago

POST /service · eip155:8453 · USDC: 40001000

price changed · 19d ago

POST /service · eip155:8453 · USDC: 10004000

Amounts are on-wire atomic units in the named asset.

see all changes for this service

WHAT IT DOES

ai-derived

Provides real-time circulating supply and chain breakdown for major stablecoins

category
stablecoin-supply
in
body
auth
api key
stablecoinsupply-trackingdefirisk-analysis

AI-generated summary. The measured data is never altered by it.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
POST /service Real-time circulating supply and chain breakdown for all major stablecoins via DefiLlama. Systemic-risk signal for treasury agents. Free source. $0.01 USDC via x402 on Base. SYNTHORA. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure. $0.001 Base USDC header
1 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to POST /service returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i -X POST 'https://stablecoin-mcap.hergertsynthora.com/service'
// 402 response (captured by monitor) · 1 payload · click to expand
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x10800a5a5B9d72251566EC651E862A8b4B427dE0",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "mimeType": "application/json",
        "resource": "https://stablecoin-mcap.hergertsynthora.com/service",
        "description": "Real-time circulating supply and chain breakdown for all major stablecoins via DefiLlama. Systemic-risk signal for treasury agents. Free source. $0.01 USDC via x402 on Base. SYNTHORA. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.",
        "maxAmountRequired": "1000",
        "maxTimeoutSeconds": 300
      }
    ],
    "freeTier": {
      "note": "send header X-WALLET: 0x<your Base address> for a free trial",
      "header": "X-WALLET",
      "callsPerWallet": 3
    },
    "resource": {
      "url": "https://stablecoin-mcap.hergertsynthora.com/service",
      "mimeType": "application/json",
      "description": "Real-time circulating supply and chain breakdown for all major stablecoins via DefiLlama. Systemic-risk signal for treasury agents. Free source. $0.01 USDC via x402 on Base. SYNTHORA. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {},
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "niche": "stablecoin-mcap",
              "result": {}
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [],
                  "properties": {}
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "ok": {
                    "type": "boolean"
                  },
                  "type": "object",
                  "niche": {
                    "type": "string"
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 7d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/synthora-stablecoin-supply/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME
08-07 · uptime 0.0%08-08 · uptime 0.0%08-09 · uptime 0.0%08-10 · uptime 0.0%08-11 · uptime 0.0%08-12 · uptime 0.0%08-13 · uptime 0.0%08-07 · uptime 0.0%08-08 · uptime 0.0%08-09 · uptime 0.0%08-10 · uptime 0.0%08-11 · uptime 0.0%08-12 · uptime 0.0%08-13 · uptime 0.0%08-0708-13
7d UPTIME 0%
RESPONSE TIME
no data
AVG RESP 1302ms
PRICE (captured 402, USD)
08-06 · $0.00108-13 · $0.001$0.00108-0608-13
SUB-SCORES (uptime + x402 compliance)
08-06 uptime: 91.8% compliance: 100% checks08-07 uptime: 91.5% compliance: 100% checks08-08 uptime: 91.2% compliance: 100% checks08-09 uptime: 90.9% compliance: 100% checks08-10 uptime: 90.7% compliance: 100% checks08-11 uptime: 90.4% compliance: 100% checks08-12 uptime: 90.2% compliance: 100% checks08-13 uptime: 90.0% compliance: 100% checksuptimecompliance08-0608-13

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)
This service shares a payout address and its probe has been failing, so its on-chain volume is suppressed until it responds again. Settlements on a shared address while a member is down are not attributed to it.
DISTINCT BUYERS
This service shares a payout address and its probe has been failing, so its distinct on-chain buyers are suppressed until it responds again. Settlements on a shared address while a member is down are not attributed to it.

COMPLIANCE

14/14 checks pass · grade A · stale (probe failing)

last 402 captured 2026-08-04 · last up 2026-08-04

  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • served over HTTPS
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

SITE PILLARS

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
recent checks (18) live · click to expand
TIME STATUS RESP CAUSE
○ DOWN 167ms bad_status: unexpected HTTP 404
○ DOWN 258ms bad_status: unexpected HTTP 404
○ DOWN 168ms bad_status: unexpected HTTP 404
○ DOWN 196ms bad_status: unexpected HTTP 404
○ DOWN 213ms bad_status: unexpected HTTP 404
○ DOWN 345ms bad_status: unexpected HTTP 404
○ DOWN 242ms bad_status: unexpected HTTP 404
○ DOWN 1721ms bad_status: unexpected HTTP 404
○ DOWN 1188ms bad_status: unexpected HTTP 404
○ DOWN 440ms bad_status: unexpected HTTP 404
○ DOWN 415ms bad_status: unexpected HTTP 404
○ DOWN 369ms bad_status: unexpected HTTP 404
○ DOWN 500ms bad_status: unexpected HTTP 404
○ DOWN 222ms bad_status: unexpected HTTP 404
○ DOWN 694ms bad_status: unexpected HTTP 404
○ DOWN 1084ms bad_status: unexpected HTTP 404
○ DOWN 1072ms bad_status: unexpected HTTP 404
○ DOWN 201ms bad_status: unexpected HTTP 404

EMBED THIS BADGE

Show that SYNTHORA Stablecoin Supply is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

SYNTHORA Stablecoin Supply listed on x402-list
status
SYNTHORA Stablecoin Supply uptime on x402-list
live uptime
// HTML
<a href="https://x402-list.com/services/synthora-stablecoin-supply?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/synthora-stablecoin-supply.svg" alt="SYNTHORA Stablecoin Supply listed on x402-list" height="28">
</a>
// Markdown
[![SYNTHORA Stablecoin Supply on x402-list](https://x402-list.com/badge/synthora-stablecoin-supply.svg)](https://x402-list.com/services/synthora-stablecoin-supply?utm_source=badge&utm_medium=referral&utm_campaign=embed)
// HTML · live uptime variant
<a href="https://x402-list.com/services/synthora-stablecoin-supply?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/synthora-stablecoin-supply.svg?data=uptime" alt="SYNTHORA Stablecoin Supply uptime on x402-list" height="28">
</a>

RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

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