Base token change report
Base token change report: compares signed, seven-day baselines with block-pinned owner, pause, proxy and supply reads, plus optional same-pool token balances. Returns field-level evidence and unknowns. No honeypot simulation, sell-tax estimate, USD liquidity valuation or safety guarantee. USDC on Base.
Answeringour last check, 2026-10-18
1 of 1checks answered this week
2625 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://saylorinnovations.com/api/base/token-risk/changes
| Category | Market data |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | valid payment request | 402 | $0.02 | 2625 ms |
Example input (from the provider)
{
"body": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"address": {
"description": "Base ERC-20 contract address.",
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"baseline": {
"description": "Optional signed baseline from a previous paid response for the same address and pool; expires after seven days.",
"maxLength": 32000,
"minLength": 20,
"type": "string"
},
"pool": {
"description": "Optional fixed pool exposing token0() and token1(), one matching address. No automatic pool selection.",
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
}
},
"required": [
"address"
],
"type": "object"
},
"bodyType": {
"const": "json",
"type": "string"
},
"method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"baseline": {
"type": "string"
},
"baseline_expires_at": {
"description": "Baseline expires at (UTC unless a time zone is given)",
"type": "string"
},
"changes": {
"items": {
"properties": {
"after": {
"type": [
"string",
"number",
"boolean"
]
},
"attention": {
"enum": [
"review",
"informational"
]
},
"before": {
"type": [
"string",
"number",
"boolean"
]
},
"change_percent": {
"description": "Change, as a percentage",
"type": [
"number",
"null"
]
},
"delta_raw": {
"description": "Delta raw",
"type": "string"
},
"field": {
"type": "string"
}
},
"required": [
"field",
"before",
"after",
"attention"
],
"type": "object"
},
"type": "array"
},
"coverage": {
"properties": {
"compared": {
"items": {
"type": "string"
},
"type": "array"
},
"not_compared": {
"description": "Not compared",
"items": {
"properties": {
"field": {
"type": "string"
},
"reason": {
"type": "string"
}
},
"required": [
"field",
"reason"
],
"type": "object"
},
"type": "array"
},
"unavailable": {
"items": {
"type": "string"
},
"type": "array"
},
"unsupported": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"compared",
"not_compared",
"unavailable",
"unsupported"
],
"type": "object"
},
"current": {
"description": "Current value",
"properties": {
"address": {
"description": "Account or contract address",
"type": "string"
},
"block": {
"description": "Block number the data was read at",
"properties": {
"hash": {
"description": "Hash of the item",
"type": "string"
},
"number": {
"description": "Number that was looked up",
"type": "string"
},
"tag": {
"const": "safe"
},
"timestamp": {
"description": "Time of the record",
"type": "string"
}
},
"required": [
"number",
"hash",
"timestamp",
"tag"
],
"type": "object"
},
"chain": {
"const": "eip155:8453",
"description": "Blockchain the data is for