Algorand: delivery grades

vet402 bought the listed Algorand x402 APIs it could buy, with its own money, from 2026-09-27 to 2026-09-28 (UTC). 24 of 79 sellers have enough purchases for a rank number.

These results come from vet402-algorand, a separate project built for Algorand's Global x402 Challenge. They are graded from Algorand purchases only, apart from the Solana, Tempo and Base page. Those runs bought up to about 500 items of one seller in under an hour, before the pacing rule of method v2.

2356
purchases tried, from 79 sellers
1148
with a settlement receipt (tx id)
1138
came back with an answer
10
with a settlement receipt, and nothing usable came back

Came back with an answer = vet402's payment settled, then the seller answered 2xx with a non-empty body. vet402 did not check that the answer is what the listing promised; whether its keys matched what the seller declared is a separate column. On Algorand, "settled" is the facilitator's settlement receipt with a tx id, as vet402-algorand recorded it; vet402 has not read these payments back on chain.

A 90%+ came back · B 75%+ · C 50%+ · D under 50% · ? undecided · … measuring

Ranked: 22 sellers with 10+ counted purchases on 2+ days. "came back" = came back with an answer / counted.
#gr.seller · chaincame backlast
1Aalgorandtracker.comAlgorand · 62 not counted248/248
2Aalgo.netintel.devAlgorand · 5 not counted224/231
3Awhaletape.xyzAlgorand · 4 not counted50/50
4Aagent402.toolsAlgorand · 971 not counted43/43
5Acoil.tradeAlgorand40/40
6Aeth-avm-light-client.vercel.appAlgorand · 1 not counted35/35
7Bblocksigner.orgAlgorand28/28
8Balgorand.ottoai.servicesAlgorand · 8 not counted120/130
9Bagenthub-production-8c75.up.railway.appAlgorand · 4 not counted20/20
9Bmoltworld.xyzAlgorand20/20
11Bapi.callrack.xyzAlgorand · 2 not counted18/18
11Bapi.depth402.workers.devAlgorand18/18
13Balgo.ochinimus.appAlgorand16/16
13Bapi.sitelenz.onlineAlgorand16/16
15Bapi.algometrics.orgAlgorand30/32
16Bnoahs-mac-mini.tail571e99.ts.netAlgorand15/15
17Bapi.synergybcpacific.comAlgorand · 2 not counted14/14
18Bagent-keep-684642514120.europe-west1.run.appAlgorand12/12
18Bapi.agentkeep.onlineAlgorand12/12
20Bcanix402-api.compx.ioAlgorand · 7 not counted23/25
21Cfinality-x402-backend.onrender.comAlgorand10/10
22Coyapicks.appAlgorand · 4 not counted14/16

Undecided (2): enough purchases, but the interval is too wide for a grade

Rank number kept; no grade yet.
#gr.seller · chaincame backlast
23?api.bottrunk.comAlgorand8/10
24?gateway-x402.vercel.appAlgorand4/10

Not counted against any seller: 970 failed purchases on vet402's or the facilitator's side and 195 with no clear cause, out of 2356 tries where vet402 sent a payment (1148 with a settlement receipt). They never lower a grade. By rule

Measuring (55): fewer than 10 counted purchases, or only one day

No grade and no rank number yet. This is not a bad mark.

Sorted by name.
#gr.seller · chaincame backlast
…402signal.comAlgorand · 2 not counted0/0
…43.162.105.66.sslip.ioAlgorand · 2 not counted2/2
…agriintellect.siteAlgorand · 1 not counted5/5
…algocheckmain.vercel.appAlgorand2/2
…algorand-api.pxke.meAlgorand2/2
…algorand-indexer.xyzAlgorand · 14 not counted0/0
…alpha-hunter-x402-production.up.railway.appAlgorand0/2
…amarok-api.compx.ioAlgorand · 5 not counted2/7
…api-algo.stelardigital.comAlgorand6/6
…api-production-36692.up.railway.appAlgorand · 1 not counted1/1
…api.agentwork.runAlgorand6/6
…api.algofile.ioAlgorand · 6 not counted0/0
…api.algorand-indexer.xyzAlgorand · 2 not counted4/4
…api.blueprintstech.orgAlgorand · 4 not counted0/2
…api.celloforigin.comAlgorand · 2 not counted0/0
…api.d0xeddev.comAlgorand4/4
…api.iomarkets.aiAlgorand4/6
…api.micropay.websiteAlgorand0/2
…api.playclock.xyzAlgorand · 2 not counted2/2
…api.pqattest.comAlgorand2/2
…api.proptech.watchAlgorand · 3 not counted5/5
…api.ripar.ioAlgorand8/8
…api.syraa.funAlgorand · 18 not counted0/0
…api.validex.spaceAlgorand8/8
…api.x402node.devAlgorand2/2
…arbiter-hs23.onrender.comAlgorand · 4 not counted0/0
…arbiter-mesh.gabrielaxy.workers.devAlgorand · 2 not counted0/0
…arbsignal-production.up.railway.appAlgorand4/4
…authen.hvym.linkAlgorand · 1 not counted0/0
…caravan-sable-nine.vercel.appAlgorand0/1
…consensa-endpoint-production.up.railway.appAlgorand2/2
…eggcracker-server-1.onrender.comAlgorand0/2
…elara-verify-x402.aivelikivodja.workers.devAlgorand2/2
…fluent-x402-algorand-production.up.railway.appAlgorand2/2
…fry.farmAlgorand · 1 not counted5/5
…hashlock.pronodealgo.xyzAlgorand · 2 not counted2/2
…kepaix.comAlgorand2/2
…legit.gonna.bondAlgorand2/2
…midax402.comAlgorand2/2
…ogimage.goplausible.xyzAlgorand · 4 not counted0/0
…ora-gate-mainnet.vercel.appAlgorand · 5 not counted0/0
…pdc-pilot-endpoint.synergyblockchaintf.workers.devAlgorand2/2
…prism-99h2.onrender.comAlgorand3/3
…proofmesh-x402.onrender.comAlgorand0/2
…roundwatch-api.onrender.comAlgorand · 1 not counted1/1
…second-opinion-production.up.railway.appAlgorand · 2 not counted0/0
…secondopinionx402.comAlgorand · 4 not counted0/0
…tendrilhq.comAlgorand · 2 not counted0/0
…thetrench.funAlgorand2/2
…untarnished-ricky-nonhierarchically.ngrok-free.devAlgorand1/1
…x402-algo.pkgproof.netAlgorand2/2
…x402-echo-service.vercel.appAlgorand · 2 not counted0/0
…x402-mesh-gateway.fly.devAlgorand0/4
…x402.diiisco.comAlgorand · 1 not counted1/1
…x402.frostylabs.aiAlgorand · 2 not counted0/0

How vet402 pays for this

Grades come only from vet402's own purchases. vet402 also sells paid checks (paid in USDC on Algorand or Base); a paid check is a separate report and never moves a grade. Every purchase file the grades read is in data/ with its sha256.