draconic21 Signal Delta
GO-TO PRODUCT: what changed in the Daily Agent Signal since a date you read: complete added, changed (fields plus before/after) and removed records, diffed against our stored archive. Body { since_date }. Free first: /v1/signal_delta/availability?since_date= (absent baseline is 422, no charge) and /v1/signal_delta/example.
Offering
- Provider
- draconic21-x402-api.onrender.com
- Method
- POST
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Data
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://draconic21-x402-api.onrender.com/v1/signal_delta- MIME type
- application/json
- First seen
- 2026-10-16T01:50:32.458Z
- Last seen
- Tags
- agent-economy, changelog, news-diff, incremental-update, daily-brief
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.05 USDC
Atomic price: 50000 · Network: eip155:8453 · Asset: USDC · Scheme: exact - Payment option 2
- 0.05 USDC
Atomic price: 50000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "50000",
"payTo": "0x1520Ef5530AA71350049BE2903Cf078B38c40AE5"
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "50000",
"payTo": "6mc4GhWFyNcMh7gAVDWrKeYjDqFtEKWKQuZ9RTw2VkfM"
}
]Observed health
- Status
- Healthy
- Latest latency
- 302 ms
- Average latency
- 348 ms
- HTTP status
- 204
- Last checked
- Reachability
- 100% over 4 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"POST"
]
},
"bodyType": {
"type": "string",
"enum": [
"json",
"form-data",
"text"
]
},
"body": {
"type": "object",
"properties": {
"since_date": {
"type": "string",
"format": "date",
"description": "Stored baseline date in YYYY-MM-DD format; check free availability first."
}
},
"required": [
"since_date"
],
"additionalProperties": true
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"additionalProperties": false
}Output schema
{
"type": "object",
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"schema",
"since_date",
"baseline_date",
"current_date",
"comparison_status",
"archive_day_count",
"days_after_since",
"counts",
"added",
"changed",
"removed",
"disclaimer"
],
"properties": {
"schema": {
"type": "string"
},
"brand": {
"type": "string"
},
"product": {
"type": "string"
},
"since_date": {
"type": "string"
},
"baseline_date": {
"type": "string"
},
"current_date": {
"type": "string"
},
"comparison_status": {
"type": "string",
"enum": [
"compared",
"no_new_archive_day"
]
},
"archive_day_count": {
"type": "integer"
},
"archive_total_days": {
"type": "integer"
},
"days_after_since": {
"type": "array",
"items": {
"type": "string"
}
},
"counts": {
"type": "object",
"required": [
"added",
"changed",
"removed",
"unchanged"
],
"properties": {
"added": {
"type": "integer"
},
"changed": {
"type": "integer"
},
"removed": {
"type": "integer"
},
"unchanged": {
"type": "integer"
}
}
},
"added": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"rank",
"headline"
],
"properties": {
"id": {
"type": "string"
},
"rank": {
"type": "integer"
},
"headline": {
"type": "string"
},
"judgment": {
"type": "string"
},
"confidence": {
"type": "string"
},
"vs_prior": {
"type": "string"
},
"sources": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
},
"changed": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"changed_fields",
"before",
"after"
],
"properties": {
"id": {
"type": "string"
},
"changed_fields": {
"type": "array",
"items": {
"type": "string"
}
},
"before": {
"type": "object",
"required": [
"id",
"rank",
"headline"
],
"properties": {
"id": {
"type": "string"
},
"rank": {
"type": "integer"
},
"headline": {
"type": "string"
},
"judgment": {
"type": "string"
},
"confidence": {
"type": "string"
},
"vs_prior": {
"type": "string"
},
"sources": {
"type": "array",
"items": {
"type": "string"
}
}
}
},
"after": {
"type": "object",
"required": [
"id",
"rank",
"headline"
],
"properties": {
"id": {
"type": "string"
},
"rank": {
"type": "integer"
},
"headline": {
"type": "string"
},
"judgment": {
"type": "string"
},
"confidence": {
"type": "string"
},
"vs_prior": {
"type": "string"
},
"sources": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
}
}
},
"removed": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"rank",
"headline"
],
"properties": {
"id": {
"type": "string"
},
"rank": {
"type": "integer"
},
"headline": {
"type": "string"
},
"judgment": {
"type": "string"
},
"confidence": {
"type": "string"
},
"vs_prior": {
"type": "string"
},
"sources": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
},
"moat": {
"type": "object",
"properties": {
"kind": {
"type": "string"
},
"note": {
"type": "string"
}
}
},
"disclaimer": {
"type": "string"
}
}
}
},
"required": [
"type"
]
}