x402 merchant
TranscriptionSpeech-to-textAudioWhisperMp3

Pay-per-use AI audio transcription API. Transcribe short MP3 and WAV audio files using Whisper Large V3 Turbo. No account or API key required. Pay with USDC on Base. 0.02 USDC per request. Maximum 120 seconds and 2 MB; MP3 and uncompressed PCM WAV only. Returns JSON: text, detected language, duration and timestamped segments. Charged only when a transcript is returned.

MerchantReport

0x2f4c…2581

0x2f4cb62bd9d1cbf3b636ab0cc83e669a2da62581Explorer
$0.10
Received
$0.00
Paid out
3
Settlements
2
Distinct counterparties
In the 3 settlements scanned

Received $0.10 of the $834.55M Roundhouse has indexed across 1,302,844 wallets — less than 0.0001% of it.

Counted from this wallet’s own settlements. The index rollup has no row for it yet, which is normal for an address first seen in the last half hour.

Chains (from the recent scan): Base (3)

Frequent counterparties

CounterpartySent to themReceived from themSettlementsLast
0x813b…575e$0.00$0.0822d agoGraph
0xc9c7…1670$0.00$0.02122h agoGraph

Ranked by settled amount over this wallet's recent settlement window — who it normally transacts with.

Data quality

80% of observed volume is with a single counterparty, in all 3 observed settlements.

Recent activity

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will check 0x2f4c…2581's payment record before paying it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/merchants/0x2f4cb62bd9d1cbf3b636ab0cc83e669a2da62581

Open skill.md
Show the prompt
Using Roundhouse, tell me whether this x402 merchant is worth paying: how many distinct
agents have paid it, how recently, and for what.

  Merchant wallet: 0x2f4cb62bd9d1cbf3b636ab0cc83e669a2da62581

curl -s 'https://api.roundhouseai.io/v0/merchants/0x2f4cb62bd9d1cbf3b636ab0cc83e669a2da62581'
curl -s 'https://api.roundhouseai.io/v0/entities/0x2f4cb62bd9d1cbf3b636ab0cc83e669a2da62581/settlements?limit=50'

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.