●

Stumble

AI PAYMENT-READY

payment-ready until 2026-10-06

Watch a public web page and get a signed webhook the moment a condition becomes true (restock, price drop, appointment slot, launch, content change, HTTP status, a new URL in a sitemap, a new item in an RSS, Atom, or JSON feed); a half-cent recheck that says whether a page changed since the hash you hold; timed wakeups; a durable callback inbox for AI agents whose session ends before the world answers. $0.005 to $2.00 per purchase, USDC on Base or Solana, no account.

Pay from $0.005 to $2.00 in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-09-03 (start of our harvest window) · $11.53 all-time · settled via coinbase

BASE URL https://stumble.vimabrosta.com │ WEBSITE https://stumble.vimabrosta.com/manual │ ENDPOINTS 7 │ NETWORK Base / Solana │ ASSET USDC │ MEMBER SINCE 2026-09-08 │ MONITORED SINCE 2026-09-08

VERDICT

ranking generation 3

solid 89/100 #10 of 162 in AI by measured score

What the score read on this service: status online, 100% uptime 30d, 435ms response p95, x402 compliance 14 of 14, $0.005 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

It is a score inside AI, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 162 listings, this one among them. That set is wider than the 162 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

ALTERNATIVES IN AI

Other AI services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE	BAND	SCORE	UPTIME 30D	VOL 30D
Otto AI	strong	95	100%	$56.13
NetIntel	strong	94	100%	$16.76
x402engine	strong	93	100%	$28.00
GlianaAI	solid	93	100%	$68.10
Agent402.tools	solid	92	99.7%	$138.77

5 of 161 other ranked services in AI · see the whole category

ASSESSMENT

updated 2h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 100%

uptime · latest daily rollup: 100%
uptime 7d: 100%
uptime 30d: 100%
uptime 90d: 100%
response p95: 435ms
avg response: 283ms
total checks: 1,872

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

compliance A (14/14)

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

jump to compliance checklist

price $0.005 to $2.00 (p32 in AI)

price (min): $0.005
price (max): $2.00
category percentile (min): p32 in AI
category percentile (max): p85 in AI
endpoints / prices: 7 / 5
model: tiered
stability: 100%

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: 60d
registrar: Cloudflare, Inc.
hosting: custom
domain created: 2026-07-24

Identity facts, not a risk score.

traction $11.52 30d · 4 buyers · top buyer 95% (address, not entity)

volume 30d: $11.52
buyers 30d: 4
settlements 30d: 19
measured since: 2026-09-03 (start of our harvest window)
last settlement: 2026-09-24
top buyer share: 95% of 30d volume (address, not entity)
trend 7d vs 30d: 0.01x the 30d daily rate
networks: eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time: $11.53
settlements all-time: 19
median settlement 30d: $0.01
max settlement 30d: $5.00
settled via: coinbase ($11.52, 19 tx)

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is part of the ranking score: a higher share lowers the traction part of the score, by up to half when one address holds all 30d volume.

CHANGES

10 in 30d

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 33m ago (10 in 30d)

price changed · 33m ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86142 → 86259

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 861411 → 862582

GET /v1/recheck · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43071 → 43130

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86142 → 86259

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 4307053 → 4312909

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 17228211 → 17251636

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 861411 → 862582

price changed · 1h ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 85557 → 86142

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 855566 → 861411

GET /v1/recheck · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 42779 → 43071

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 85557 → 86142

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 4277827 → 4307053

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 17111308 → 17228211

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 855566 → 861411

price changed · 22h ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 83488 → 85557

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 834876 → 855566

GET /v1/recheck · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 41744 → 42779

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 83488 → 85557

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 4174378 → 4277827

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 16697512 → 17111308

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 834876 → 855566

price changed · 3d ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 83173 → 84163

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 831729 → 841626

GET /v1/recheck · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 41587 → 42082

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 83173 → 84163

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 4158644 → 4208127

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 16634573 → 16832505

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 831729 → 841626

price changed · 3d ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86667 → 83173

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 866670 → 831729

GET /v1/recheck · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43334 → 41587

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86667 → 83173

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 4333348 → 4158644

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 17333391 → 16634573

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 866670 → 831729

price changed · 4d ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86314 → 86667

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 863132 → 866670

GET /v1/recheck · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43157 → 43334

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86314 → 86667

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 4315660 → 4333348

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 17262639 → 17333391

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 863132 → 866670

price changed · 8d ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 93631 → 86314

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 936304 → 863132

GET /v1/recheck · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 46816 → 43157

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 93631 → 86314

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 4681519 → 4315660

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 18726074 → 17262639

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 936304 → 863132

price changed · 9d ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 90751 → 93631

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 907506 → 936304

GET /v1/recheck · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 45376 → 46816

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 90751 → 93631

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 4537530 → 4681519

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 18150119 → 18726074

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 907506 → 936304

price changed · 10d ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 104451 → 90751

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 1044508 → 907506

GET /v1/recheck · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 52226 → 45376

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 104451 → 90751

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 5222537 → 4537530

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 20890147 → 18150119

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 1044508 → 907506

price changed · 13d ago

GET /v1/checks · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 98444 → 104451

GET /v1/inbox · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 984434 → 1044508

GET /v1/wake · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 98444 → 104451

GET /v1/watches/fast · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 4922167 → 5222537

GET /v1/watches/sniper · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 19688667 → 20890147

GET /v1/watches/standard · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 984434 → 1044508

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

see all changes for this service

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	PRICE	NETWORK	ASSET	402 CHANNEL
GET	/v1/checks	$0.01	Base/Solana	USDC	header
GET	/v1/inbox	$0.10	Base/Solana	USDC	header
GET	/v1/recheck	$0.005	Base/Solana	USDC	header
GET	/v1/wake	$0.01	Base/Solana	USDC	header
GET	/v1/watches/fast	$0.50	Base/Solana	USDC	header
GET	/v1/watches/sniper	$2.00	Base/Solana	USDC	header
GET	/v1/watches/standard	$0.10	Base/Solana	USDC	header

7 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /v1/checks returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i 'https://stumble.vimabrosta.com/v1/checks'

// 402 response (captured by monitor) · 7 payloads · click to expand

[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xd63e74bCB00757C8fDb1817F1558ed8b97C608b6",
        "amount": "500000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "500000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "4312177",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://stumble.vimabrosta.com/v1/watches/fast",
      "mimeType": "application/json",
      "description": "Create a fast watch: Stumble polls a public URL every 60 seconds for up to 7 days and notifies your webhook (or lets you poll for free) the moment a condition becomes true (keyword, selector, JSON path, price, content change, HTTP status, new sitemap URL, new feed item). One-time $0.50, no account needed. Ideal for restocks and appointment slots."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xd63e74bCB00757C8fDb1817F1558ed8b97C608b6",
        "amount": "2000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "2000000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "17248705",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://stumble.vimabrosta.com/v1/watches/sniper",
      "mimeType": "application/json",
      "description": "Create a sniper watch: Stumble polls a public URL every 10 seconds for up to 48 hours and notifies your webhook within seconds of a condition becoming true (keyword, selector, JSON path, price, content change, HTTP status, new sitemap URL, new feed item). One-time $2.00, no account needed. Ideal for drops and on-sale moments where seconds matter."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xd63e74bCB00757C8fDb1817F1558ed8b97C608b6",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "86244",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://stumble.vimabrosta.com/v1/checks",
      "mimeType": "application/json",
      "description": "Fetch a public URL once, right now, and evaluate a condition against it (keyword, CSS selector, JSON path, price threshold, content hash, or HTTP status). Returns matched:true/false with the extracted value and a short evidence excerpt. Synchronous; typical response under 3 seconds. $0.01 per check."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xd63e74bCB00757C8fDb1817F1558ed8b97C608b6",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "100000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "862436",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://stumble.vimabrosta.com/v1/inbox",
      "mimeType": "application/json",
      "description": "Open an inbox: a capture URL that holds anything POSTed to it for up to 7 days (an A2A push, an MCP task completion, a GitHub or payment webhook, another agent) and forwards each message to your webhook in a signed envelope, or lets you poll. The durable recipient a finished session cannot be. Up to 200 messages of 64KB, optional shared-secret header. One-time $0.10."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xd63e74bCB00757C8fDb1817F1558ed8b97C608b6",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "100000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "862436",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://stumble.vimabrosta.com/v1/watches/standard",
      "mimeType": "application/json",
      "description": "Create a watch: Stumble polls a public URL every 15 minutes for up to 14 days and notifies your webhook (or lets you poll for free) the moment a condition becomes true (keyword, CSS selector, JSON path, price threshold, content change, HTTP status, a new URL in a sitemap, a new item in an RSS, Atom, or JSON feed). One-time $0.10, no account needed. Ideal for price drops, release feeds, and slow-moving pages."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xd63e74bCB00757C8fDb1817F1558ed8b97C608b6",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "86244",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://stumble.vimabrosta.com/v1/wake",
      "mimeType": "application/json",
      "description": "Schedule a wake: Stumble calls your webhook at a time you set (up to 30 days ahead), echoing back a JSON payload you stored, signed with your one-time secret and retried on failure. Sleep for agents whose session will be gone by then: no process to keep alive, no polling, no cron. One-time $0.01, no account needed."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xd63e74bCB00757C8fDb1817F1558ed8b97C608b6",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "5000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "8c9r8kxtkcsv7wARq3wBy2csm1ySRQQmdy6hrPnga4qs",
        "amount": "43122",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://stumble.vimabrosta.com/v1/recheck",
      "mimeType": "application/json",
      "description": "Recheck a URL: has this page changed since the hash you hold? One fetch, one sha256 of the visible text (or of one CSS selector's text), compared with the hash from your last look. Returns changed true/false, the new hash, and a short excerpt, so you only re-read a page into your context when it actually changed. Works on HTML and JSON. GET with query parameters or POST with a JSON body. Synchronous, $0.005, no account needed."
    },
    "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/stumble/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

7D UPTIME 100%

RESPONSE TIME

AVG RESP 283ms

PRICE (captured 402, USD)

Median across 7 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)

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

PILLARS OVER TIME (measured)

price percentile in AI

site signals present (of 6)

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)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-09-29 · last up 2026-09-29

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

05:05:22 UTC ● OK 171ms

04:49:23 UTC ● OK 215ms

04:33:27 UTC ● SLOW 701ms

04:17:24 UTC ● OK 219ms

04:01:24 UTC ● OK 109ms

03:45:22 UTC ● OK 328ms

03:29:22 UTC ● OK 206ms

03:13:22 UTC ● OK 166ms

02:57:21 UTC ● OK 199ms

02:41:21 UTC ● OK 196ms

02:25:24 UTC ● OK 275ms

02:09:19 UTC ● OK 252ms

01:53:23 UTC ● OK 215ms

01:37:20 UTC ● OK 223ms

01:21:22 UTC ● OK 210ms

01:05:23 UTC ● OK 283ms

00:49:24 UTC ● OK 313ms

00:33:18 UTC ● OK 192ms

EMBED THIS BADGE

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

status

Stumble uptime on x402-list — live uptime

// HTML

<a href="https://x402-list.com/services/stumble?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/stumble.svg" alt="Stumble listed on x402-list" height="28">
</a>

// Markdown

[![Stumble on x402-list](https://x402-list.com/badge/stumble.svg)](https://x402-list.com/services/stumble?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/stumble?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/stumble.svg?data=uptime" alt="Stumble 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 ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

To request delisting, email info@x402-list.com or update your listing at /services/stumble/update.