Nexari Agent Tools
payment-ready until 2026-11-20
Speech-to-text for AI agents, run by Nexari GmbH on its own hardware in Germany (EU data stays in Germany).
Compare: all PDF APIs · all transcription APIs
Call it x402 v2
x402 v2
- Base URL
- https://x402.nexari.cloud
- Payment
- x402 v2, header channel
$ curl -i 'https://x402.nexari.cloud/hello' An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.
Endpoints 8 paid routes on x402.nexari.cloud
GET/hello Base$0.001since 11-13
POST/letter/send/q_example Base$2.99since 11-13
POST/transcribe/10min Base$0.10since 11-13
POST/transcribe/10min/speakers Base$0.20since 11-13
POST/transcribe/2min Base$0.02since 11-13
POST/transcribe/2min/speakers Base$0.04since 11-13
POST/transcribe/30min Base$0.30since 11-13
POST/transcribe/30min/speakers Base$0.60since 11-13
Prices as captured in the 402 response: median $0.15 across the 8 endpoints, unchanged since first capture.
Example 402 response
Endpoints and prices
| Method | Path | Description | Price | Network | Asset | 402 channel | Captured |
|---|---|---|---|---|---|---|---|
| GET | / | B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. Hallo Welt der Nexari GmbH: kleinster bezahlter Test-Endpunkt, gibt Gruß, Zeit und gezahlten Betrag zurück. Hello world from Germany: smallest paid x402 smoke test, returns greeting, timestamp and paid amount. Provider runs a monthly paid self-test. | $0.001 | Base | USDC | header | since 11-13 |
| POST | / | B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Briefversand in Deutschland: gedruckt und per Deutsche Post versendet. Erst POST /letter/quote (gratis), dann mit quote_id bezahlen. Physical letter mailing within Germany. Get a free quote first. | $2.99 | Base | USDC | header | since 11-13 |
| POST | / | B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription bis 10 Min Audio, Whisper large-v3-turbo, Deutsch optimiert, verarbeitet in Deutschland. Speech-to-text for audio up to 10 min (mp3, m4a, ogg, wav, mp4), German-optimised, processed in Germany. JSON body with audio_url or audio_base64. Longer files are rejected before payment settles. Provider runs a monthly paid self-test. | $0.10 | Base | USDC | header | since 11-13 |
| POST | / | B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription mit Sprechertrennung bis 10 Min Audio (pyannote + Whisper), verarbeitet in Deutschland. Speech-to-text with speaker diarization for audio up to 10 min, German-optimised, processed in Germany. Provider runs a monthly paid self-test. | $0.20 | Base | USDC | header | since 11-13 |
| POST | / | B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription bis 2 Min Audio, Whisper large-v3-turbo, Deutsch optimiert, verarbeitet in Deutschland. Speech-to-text for audio up to 2 min (mp3, m4a, ogg, wav, mp4), German-optimised, processed in Germany. JSON body with audio_url or audio_base64. Longer files are rejected before payment settles. Provider runs a monthly paid self-test. | $0.02 | Base | USDC | header | since 11-13 |
| POST | / | B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription mit Sprechertrennung bis 2 Min Audio (pyannote + Whisper), verarbeitet in Deutschland. Speech-to-text with speaker diarization for audio up to 2 min, German-optimised, processed in Germany. Provider runs a monthly paid self-test. | $0.04 | Base | USDC | header | since 11-13 |
| POST | / | B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription bis 30 Min Audio, Whisper large-v3-turbo, Deutsch optimiert, verarbeitet in Deutschland. Speech-to-text for audio up to 30 min (mp3, m4a, ogg, wav, mp4), German-optimised, processed in Germany. JSON body with audio_url or audio_base64. Longer files are rejected before payment settles. Provider runs a monthly paid self-test. | $0.30 | Base | USDC | header | since 11-13 |
| POST | / | B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription mit Sprechertrennung bis 30 Min Audio (pyannote + Whisper), verarbeitet in Deutschland. Speech-to-text with speaker diarization for audio up to 30 min, German-optimised, processed in Germany. Provider runs a monthly paid self-test. | $0.60 | Base | USDC | header | since 11-13 |
Payment evidence
402 payload captured at . Check evidence JSON · Measurement methodology.
First of 8 payloads captured by the monitor.
113 lines, scroll inside
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5c3351bf0843e533054E87E05B20486f25B04254",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402.nexari.cloud/hello",
"tags": [
"test",
"hello",
"germany",
"nexari"
],
"iconUrl": "https://x402.nexari.cloud/icon.png",
"mimeType": "application/json",
"description": "B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. Hallo Welt der Nexari GmbH: kleinster bezahlter Test-Endpunkt, gibt Gruß, Zeit und gezahlten Betrag zurück. Hello world from Germany: smallest paid x402 smoke test, returns greeting, timestamp and paid amount. Provider runs a monthly paid self-test.",
"serviceName": "Nexari Agent Tools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"name": "Agent",
"accept_terms_hash": "58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f"
}
},
"output": {
"type": "json",
"example": {
"message": "Hallo Agent, Grüße aus Deutschland!",
"paid_usd": "0.001"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"name": {
"type": "string"
},
"business_name": {
"type": "string",
"description": "Unternehmen, für das gehandelt wird (nur B2B)"
},
"accept_terms_hash": {
"type": "string",
"description": "Optional: SHA-256 der AGB; muss passen, wenn angegeben"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
} Other captured 402 responses (7)
Captured payload 2 of 8
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5c3351bf0843e533054E87E05B20486f25B04254",
"amount": "200000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 900
}
],
"resource": {
"url": "https://x402.nexari.cloud/transcribe/10min/speakers",
"tags": [
"transcription",
"diarization",
"speakers",
"germany",
"nexari"
],
"iconUrl": "https://x402.nexari.cloud/icon.png",
"mimeType": "application/json",
"description": "B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription mit Sprechertrennung bis 10 Min Audio (pyannote + Whisper), verarbeitet in Deutschland. Speech-to-text with speaker diarization for audio up to 10 min, German-optimised, processed in Germany. Provider runs a monthly paid self-test.",
"serviceName": "Nexari Agent Tools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"language": "de",
"audio_url": "https://example.com/memo.m4a",
"business_name": "Beispiel GmbH",
"accept_terms_hash": "58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"text": "Hallo, das ist eine Testnachricht.",
"status": "done",
"language": "de",
"segments": [
{
"end": 2.4,
"text": "Hallo, das ist eine Testnachricht.",
"start": 0,
"speaker": "SPEAKER_00"
}
],
"duration_seconds": 42.1
}
}
},
"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": {
"required": [
"business_name"
],
"properties": {
"filename": {
"type": "string",
"description": "Dateiname mit Endung, z. B. memo.m4a"
},
"language": {
"type": "string",
"description": "de (Standard), en, auto ..."
},
"audio_url": {
"type": "string",
"description": "HTTPS-URL der Audiodatei / public URL of the audio file"
},
"audio_base64": {
"type": "string",
"description": "Audio als Base64 / audio as base64"
},
"num_speakers": {
"type": "integer",
"description": "Nur /speakers: bekannte Sprecherzahl (1-10), verbessert die Trennung"
},
"business_name": {
"type": "string",
"description": "Unternehmen, für das gehandelt wird (nur B2B)"
},
"privacy_contact": {
"type": "string",
"description": "Optional: E-Mail für Mitteilungen nach der AVV (Art. 33 DSGVO)"
},
"accept_terms_hash": {
"type": "string",
"description": "Optional: SHA-256 der AGB; muss passen, wenn angegeben"
}
}
},
"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": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 3 of 8
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5c3351bf0843e533054E87E05B20486f25B04254",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 900
}
],
"resource": {
"url": "https://x402.nexari.cloud/transcribe/2min",
"tags": [
"transcription",
"speech-to-text",
"whisper",
"germany",
"nexari"
],
"iconUrl": "https://x402.nexari.cloud/icon.png",
"mimeType": "application/json",
"description": "B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription bis 2 Min Audio, Whisper large-v3-turbo, Deutsch optimiert, verarbeitet in Deutschland. Speech-to-text for audio up to 2 min (mp3, m4a, ogg, wav, mp4), German-optimised, processed in Germany. JSON body with audio_url or audio_base64. Longer files are rejected before payment settles. Provider runs a monthly paid self-test.",
"serviceName": "Nexari Agent Tools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"language": "de",
"audio_url": "https://example.com/memo.m4a",
"business_name": "Beispiel GmbH",
"accept_terms_hash": "58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"text": "Hallo, das ist eine Testnachricht.",
"status": "done",
"language": "de",
"segments": [
{
"end": 2.4,
"text": "Hallo, das ist eine Testnachricht.",
"start": 0
}
],
"duration_seconds": 42.1
}
}
},
"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": {
"required": [
"business_name"
],
"properties": {
"filename": {
"type": "string",
"description": "Dateiname mit Endung, z. B. memo.m4a"
},
"language": {
"type": "string",
"description": "de (Standard), en, auto ..."
},
"audio_url": {
"type": "string",
"description": "HTTPS-URL der Audiodatei / public URL of the audio file"
},
"audio_base64": {
"type": "string",
"description": "Audio als Base64 / audio as base64"
},
"num_speakers": {
"type": "integer",
"description": "Nur /speakers: bekannte Sprecherzahl (1-10), verbessert die Trennung"
},
"business_name": {
"type": "string",
"description": "Unternehmen, für das gehandelt wird (nur B2B)"
},
"privacy_contact": {
"type": "string",
"description": "Optional: E-Mail für Mitteilungen nach der AVV (Art. 33 DSGVO)"
},
"accept_terms_hash": {
"type": "string",
"description": "Optional: SHA-256 der AGB; muss passen, wenn angegeben"
}
}
},
"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": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 4 of 8
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5c3351bf0843e533054E87E05B20486f25B04254",
"amount": "40000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 900
}
],
"resource": {
"url": "https://x402.nexari.cloud/transcribe/2min/speakers",
"tags": [
"transcription",
"diarization",
"speakers",
"germany",
"nexari"
],
"iconUrl": "https://x402.nexari.cloud/icon.png",
"mimeType": "application/json",
"description": "B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription mit Sprechertrennung bis 2 Min Audio (pyannote + Whisper), verarbeitet in Deutschland. Speech-to-text with speaker diarization for audio up to 2 min, German-optimised, processed in Germany. Provider runs a monthly paid self-test.",
"serviceName": "Nexari Agent Tools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"language": "de",
"audio_url": "https://example.com/memo.m4a",
"business_name": "Beispiel GmbH",
"accept_terms_hash": "58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"text": "Hallo, das ist eine Testnachricht.",
"status": "done",
"language": "de",
"segments": [
{
"end": 2.4,
"text": "Hallo, das ist eine Testnachricht.",
"start": 0,
"speaker": "SPEAKER_00"
}
],
"duration_seconds": 42.1
}
}
},
"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": {
"required": [
"business_name"
],
"properties": {
"filename": {
"type": "string",
"description": "Dateiname mit Endung, z. B. memo.m4a"
},
"language": {
"type": "string",
"description": "de (Standard), en, auto ..."
},
"audio_url": {
"type": "string",
"description": "HTTPS-URL der Audiodatei / public URL of the audio file"
},
"audio_base64": {
"type": "string",
"description": "Audio als Base64 / audio as base64"
},
"num_speakers": {
"type": "integer",
"description": "Nur /speakers: bekannte Sprecherzahl (1-10), verbessert die Trennung"
},
"business_name": {
"type": "string",
"description": "Unternehmen, für das gehandelt wird (nur B2B)"
},
"privacy_contact": {
"type": "string",
"description": "Optional: E-Mail für Mitteilungen nach der AVV (Art. 33 DSGVO)"
},
"accept_terms_hash": {
"type": "string",
"description": "Optional: SHA-256 der AGB; muss passen, wenn angegeben"
}
}
},
"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": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 5 of 8
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5c3351bf0843e533054E87E05B20486f25B04254",
"amount": "100000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 900
}
],
"resource": {
"url": "https://x402.nexari.cloud/transcribe/10min",
"tags": [
"transcription",
"speech-to-text",
"whisper",
"germany",
"nexari"
],
"iconUrl": "https://x402.nexari.cloud/icon.png",
"mimeType": "application/json",
"description": "B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription bis 10 Min Audio, Whisper large-v3-turbo, Deutsch optimiert, verarbeitet in Deutschland. Speech-to-text for audio up to 10 min (mp3, m4a, ogg, wav, mp4), German-optimised, processed in Germany. JSON body with audio_url or audio_base64. Longer files are rejected before payment settles. Provider runs a monthly paid self-test.",
"serviceName": "Nexari Agent Tools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"language": "de",
"audio_url": "https://example.com/memo.m4a",
"business_name": "Beispiel GmbH",
"accept_terms_hash": "58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"text": "Hallo, das ist eine Testnachricht.",
"status": "done",
"language": "de",
"segments": [
{
"end": 2.4,
"text": "Hallo, das ist eine Testnachricht.",
"start": 0
}
],
"duration_seconds": 42.1
}
}
},
"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": {
"required": [
"business_name"
],
"properties": {
"filename": {
"type": "string",
"description": "Dateiname mit Endung, z. B. memo.m4a"
},
"language": {
"type": "string",
"description": "de (Standard), en, auto ..."
},
"audio_url": {
"type": "string",
"description": "HTTPS-URL der Audiodatei / public URL of the audio file"
},
"audio_base64": {
"type": "string",
"description": "Audio als Base64 / audio as base64"
},
"num_speakers": {
"type": "integer",
"description": "Nur /speakers: bekannte Sprecherzahl (1-10), verbessert die Trennung"
},
"business_name": {
"type": "string",
"description": "Unternehmen, für das gehandelt wird (nur B2B)"
},
"privacy_contact": {
"type": "string",
"description": "Optional: E-Mail für Mitteilungen nach der AVV (Art. 33 DSGVO)"
},
"accept_terms_hash": {
"type": "string",
"description": "Optional: SHA-256 der AGB; muss passen, wenn angegeben"
}
}
},
"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": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 6 of 8
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5c3351bf0843e533054E87E05B20486f25B04254",
"amount": "300000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 900
}
],
"resource": {
"url": "https://x402.nexari.cloud/transcribe/30min",
"tags": [
"transcription",
"speech-to-text",
"whisper",
"germany",
"nexari"
],
"iconUrl": "https://x402.nexari.cloud/icon.png",
"mimeType": "application/json",
"description": "B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription bis 30 Min Audio, Whisper large-v3-turbo, Deutsch optimiert, verarbeitet in Deutschland. Speech-to-text for audio up to 30 min (mp3, m4a, ogg, wav, mp4), German-optimised, processed in Germany. JSON body with audio_url or audio_base64. Longer files are rejected before payment settles. Provider runs a monthly paid self-test.",
"serviceName": "Nexari Agent Tools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"language": "de",
"audio_url": "https://example.com/memo.m4a",
"business_name": "Beispiel GmbH",
"accept_terms_hash": "58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"text": "Hallo, das ist eine Testnachricht.",
"status": "done",
"language": "de",
"segments": [
{
"end": 2.4,
"text": "Hallo, das ist eine Testnachricht.",
"start": 0
}
],
"duration_seconds": 42.1
}
}
},
"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": {
"required": [
"business_name"
],
"properties": {
"filename": {
"type": "string",
"description": "Dateiname mit Endung, z. B. memo.m4a"
},
"language": {
"type": "string",
"description": "de (Standard), en, auto ..."
},
"audio_url": {
"type": "string",
"description": "HTTPS-URL der Audiodatei / public URL of the audio file"
},
"audio_base64": {
"type": "string",
"description": "Audio als Base64 / audio as base64"
},
"num_speakers": {
"type": "integer",
"description": "Nur /speakers: bekannte Sprecherzahl (1-10), verbessert die Trennung"
},
"business_name": {
"type": "string",
"description": "Unternehmen, für das gehandelt wird (nur B2B)"
},
"privacy_contact": {
"type": "string",
"description": "Optional: E-Mail für Mitteilungen nach der AVV (Art. 33 DSGVO)"
},
"accept_terms_hash": {
"type": "string",
"description": "Optional: SHA-256 der AGB; muss passen, wenn angegeben"
}
}
},
"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": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 7 of 8
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5c3351bf0843e533054E87E05B20486f25B04254",
"amount": "600000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 900
}
],
"resource": {
"url": "https://x402.nexari.cloud/transcribe/30min/speakers",
"tags": [
"transcription",
"diarization",
"speakers",
"germany",
"nexari"
],
"iconUrl": "https://x402.nexari.cloud/icon.png",
"mimeType": "application/json",
"description": "B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Transkription mit Sprechertrennung bis 30 Min Audio (pyannote + Whisper), verarbeitet in Deutschland. Speech-to-text with speaker diarization for audio up to 30 min, German-optimised, processed in Germany. Provider runs a monthly paid self-test.",
"serviceName": "Nexari Agent Tools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"language": "de",
"audio_url": "https://example.com/memo.m4a",
"business_name": "Beispiel GmbH",
"accept_terms_hash": "58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"text": "Hallo, das ist eine Testnachricht.",
"status": "done",
"language": "de",
"segments": [
{
"end": 2.4,
"text": "Hallo, das ist eine Testnachricht.",
"start": 0,
"speaker": "SPEAKER_00"
}
],
"duration_seconds": 42.1
}
}
},
"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": {
"required": [
"business_name"
],
"properties": {
"filename": {
"type": "string",
"description": "Dateiname mit Endung, z. B. memo.m4a"
},
"language": {
"type": "string",
"description": "de (Standard), en, auto ..."
},
"audio_url": {
"type": "string",
"description": "HTTPS-URL der Audiodatei / public URL of the audio file"
},
"audio_base64": {
"type": "string",
"description": "Audio als Base64 / audio as base64"
},
"num_speakers": {
"type": "integer",
"description": "Nur /speakers: bekannte Sprecherzahl (1-10), verbessert die Trennung"
},
"business_name": {
"type": "string",
"description": "Unternehmen, für das gehandelt wird (nur B2B)"
},
"privacy_contact": {
"type": "string",
"description": "Optional: E-Mail für Mitteilungen nach der AVV (Art. 33 DSGVO)"
},
"accept_terms_hash": {
"type": "string",
"description": "Optional: SHA-256 der AGB; muss passen, wenn angegeben"
}
}
},
"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": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 8 of 8
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5c3351bf0843e533054E87E05B20486f25B04254",
"amount": "2990000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402.nexari.cloud/letter/send/q_example",
"tags": [
"letter",
"post",
"mail",
"germany",
"nexari"
],
"iconUrl": "https://x402.nexari.cloud/icon.png",
"mimeType": "application/json",
"description": "B2B only. Paying accepts AGB/terms https://x402.nexari.cloud/legal/agb/58bf28adb3823f1418b74e12f1995e5e8629ccbf6fb7d73b6174355c14f1411f. business_name required. Briefversand in Deutschland: gedruckt und per Deutsche Post versendet. Erst POST /letter/quote (gratis), dann mit quote_id bezahlen. Physical letter mailing within Germany. Get a free quote first.",
"serviceName": "Nexari Agent Tools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {},
"type": "http",
"method": "POST",
"bodyType": "json",
"pathParams": {
"quote_id": "q_example"
}
},
"output": {
"type": "json",
"example": {
"status": "received",
"letter_id": "l_abc123",
"planned_date": "2026-09-24"
}
}
},
"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": {
"properties": {}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"pathParams": {
"type": "object",
"required": [
"quote_id"
],
"properties": {
"quote_id": {
"type": "string"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
},
"routeTemplate": "/letter/send/:quote_id"
}
},
"x402Version": 2
}Can I trust it score from our own monitoring
score from our own monitoring
99/100 Strong
#1 of 222 in AI. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.
- Reliability
- 100% uptime since 11-13
- Compliance
- A 14/14 checks pass
- Price
- $0.001 to $2.99 p11 in AI
- Risk
- clean no risk flag
- Traction
- ---
14/14 compliance checks
- 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
402 terms unchanged since 2026-11-13. Last up 2026-11-13.
── Site signals
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
How the score works
What the score read on this service: status online, 100% uptime, latest daily rollup (no 30d window yet), 179ms response p95, x402 compliance 14 of 14, $0.001 price against the category. 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.
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.
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 222 listings, this one among them: the same 222 the position above is counted against. When the two differ, the field is the wider one, 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.
All measured facts
What it does
Speech-to-text for AI agents, run by Nexari GmbH on its own hardware in Germany (EU data stays in Germany). German-optimised Whisper large-v3-turbo with optional speaker diarization (pyannote), tiers up to 2, 10 or 30 minutes, from 0.02 USD. JSON body with audio_url or audio_base64 plus business_name; longer files return a job_id and a free result_url to poll. Also: physical letter mailing within Germany (PDF printed and posted via Deutsche Post, free quote first, from 2.99 USD) and a 0.001 USD hello-world smoke test. B2B only, terms at /legal/agb, OpenAPI with x-payment-info at /openapi.json.
Nexari Agent Tools is a listed x402 AI API. Captured payment terms name Base. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.
Assessment computed at . Latest service check observed at . Service data JSON · Measurement methodology.
Page rendered at . This response time is separate from the observation and computation times attached to each measurement.
Latest endpoint observation: . Latest price capture: . Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.
Assessment computed at . Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.
Observed daily coverage: 2026-10-15 to 2026-11-13 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.
Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.
x402 List home · Services · AI
- uptime · latest daily rollup
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- 179ms
- avg response
- 179ms
- total checks
- 1
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
- price (min)
- $0.001
- price (max)
- $2.99
- category percentile (min)
- p11 in AI
- category percentile (max)
- p89 in AI
- endpoints / prices
- 8 / 8
- model
- tiered
- stability
- 100%
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
- -
- registrar
- -
- hosting
- custom
- domain created
- ---
Identity facts, not a risk score.
On-chain traction has not been assessed for this service yet.
- member since
- 2026-11-13
Recent checks
| Checked at (UTC) | Status | HTTP | Response | Endpoints |
|---|---|---|---|---|
| Online | 402 | 123ms | 8 | |
| Online | 402 | 121ms | 8 | |
| Online | 402 | 315ms | 8 | |
| Online | 402 | 220ms | 8 | |
| Online | 402 | 89ms | 8 | |
| Online | 402 | 146ms | 8 | |
| Online | 402 | 255ms | 8 | |
| Online | 402 | 163ms | 8 | |
| Online | 402 | 141ms | 8 | |
| Online | 402 | 214ms | 8 | |
| Online | 402 | 224ms | 8 | |
| Online | 402 | 179ms | 8 |
Changes0 in 30d
No changes recorded in the last 30 days.
Over time
On-chain volume
On-chain traction has not been assessed for this service yet.
Uptime no completed-day data
- Uptime
- no completed-day data
On-chain traction has not been assessed for this service yet.
More charts
Response time daily average, ms min 176ms, avg 176ms, max 176ms
10-15 to 11-13* UTC
Each series spans only the dates it has data for. Every series is also served as JSON at /api, /scores, /volume and /buyers.
Values
* today so far, partial (UTC).
The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.
Assessment history last recorded at . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.
| Day | Uptime | Response | Compliance | Price percentile | Site signals |
|---|---|---|---|---|---|
| 2026-11-13* | 100% | 176.38ms | 14/14 | p11 | 4/6 |
Alternatives in AI
5 of 221 other ranked services in AI, ordered by the same measured score.
Own this service?
Keep this listing accurate. Ownership is proven with a domain check and every change is reviewed by hand.
Update this listingEarn 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)Embed a badge
HTML
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Markdown
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HTML, live uptime variant
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Delisting
To request delisting, email info@x402-list.com with the service name, slug, or URL. Removal is free and does not require proof of ownership. See all free email requests.