power-pack-x402.fly.dev
Score an outreach email on subject quality, body quality, predicted open rate, spam risk, tone, length, personalization, and CTA clarity. Returns top 3 specific improvement suggestions and a stronger rewritten subject line. Useful for sales/marketing/recruiting AI agents that need QA before sending. Powered by Claude Haiku 4.5 with senior-copywriter system prompt.
InferenceLiveeip155:8453Exactvia cdp
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 snapshots so far.
$39.90
Verified settled volume
177 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-12 04:39Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x7861db4efc14a1ed5dd8c96c528a3796560f1393The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0x7861…f1393. The signed payment is good for 5 minutes.
- Paid to
- 0x7861…f1393
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x7861db4efc14a1ed5dd8c96c528a3796560f1393",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"body": "I noticed your team is scaling outbound. We built a lightweight scoring step that catches weak calls to action before an email is sent. Would a 15-minute walkthrough on Tuesday be useful?",
"subject": "Quick question about your outbound workflow",
"recipient_context": "VP Sales at a B2B SaaS company"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"score": {
"tone": "salesy",
"verdict": "revise_then_send",
"spam_risk": 3,
"body_score": 71,
"cta_clarity": 6,
"subject_score": 62,
"top_improvements": [
{
"fix": "Reference their specific company milestone",
"area": "subject",
"issue": "Generic 'Quick question'"
},
{
"fix": "Open with the prospect-specific hook",
"area": "opening",
"issue": "Starts with 'I hope this finds you well'"
},
{
"fix": "Propose a specific 15-min slot",
"area": "cta",
"issue": "Vague 'let me know'"
}
],
"length_assessment": "too_long",
"rewritten_subject": "Saw your Q3 launch — one idea on the onboarding flow",
"personalization_score": 4,
"predicted_open_rate_pct": 28
}
}
}
},
"schema": {
"type": "object",
"$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": [
"subject",
"body"
],
"properties": {
"body": {
"type": "string",
"minLength": 20,
"description": "Email body copy"
},
"subject": {
"type": "string",
"minLength": 3,
"description": "Email subject line"
},
"recipient_context": {
"type": "string",
"description": "Optional recipient role, company, or relevant context"
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"ok",
"score"
],
"properties": {
"ok": {
"const": true
},
"score": {
"type": "object",
"required": [
"subject_score",
"body_score",
"predicted_open_rate_pct",
"spam_risk",
"tone",
"length_assessment",
"personalization_score",
"cta_clarity",
"top_improvements",
"rewritten_subject",
"verdict"
],
"properties": {
"tone": {
"enum": [
"professional",
"casual",
"aggressive",
"friendly",
"robotic",
"salesy",
"authentic"
]
},
"verdict": {
"enum": [
"send_as_is",
"revise_then_send",
"rewrite_completely"
]
},
"spam_risk": {
"type": "integer",
"maximum": 10,
"minimum": 0
},
"body_score": {
"type": "integer",
"maximum": 100,
"minimum": 0
},
"cta_clarity": {
"type": "integer",
"maximum": 10,
"minimum": 0
},
"subject_score": {
"type": "integer",
"maximum": 100,
"minimum": 0
},
"top_improvements": {
"type": "array",
"items": {
"type": "object",
"required": [
"area",
"issue",
"fix"
],
"properties": {
"fix": {
"type": "string"
},
"area": {
"enum": [
"subject",
"opening",
"body",
"cta",
"signoff"
]
},
"issue": {
"type": "string"
}
},
"additionalProperties": false
},
"maxItems": 3,
"minItems": 3
},
"length_assessment": {
"enum": [
"too_short",
"ideal",
"too_long"
]
},
"rewritten_subject": {
"type": "string"
},
"personalization_score": {
"type": "integer",
"maximum": 10,
"minimum": 0
},
"predicted_open_rate_pct": {
"type": "integer",
"maximum": 100,
"minimum": 0
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-12 04:39Z
- Last indexed by Roundhouse
- 2026-09-25 01:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-11 02:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 404
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service power-pack-x402.fly.dev and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=power-pack-x402.fly.dev' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://power-pack-x402.fly.dev/api/score-email, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.