Compare two IAM policies and report what the change grants or removes
Compare two IAM policies and report what the change grants or removes. The comparison is over action-and-resource pairs rather than over statements, so a refactor that splits one statement into three reports no change. A newly written pair already covered by a broader unconditioned pattern is noted rather than reported, since nothing new is granted. A removed Deny is reported as a widening even when no Allow changed, because a Deny overrides every Allow.
Answeringour last check, 2026-10-04
1 of 1checks answered this week
2385 msmedian answer time
$0.19listed price per call
$0.19price 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://api.zfinia.com/x402/v1/iam-policy-diff
| Category | Everything else |
|---|---|
| Provider host | api.zfinia.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-04 | valid payment request | 402 | $0.19 | 2385 ms |
Example input (from the provider)
{
"body": {
"after": "{\n \"Version\": \"2012-10-17\",\n \"Statement\": [\n {\n \"Sid\": \"ReadExports\",\n \"Effect\": \"Allow\",\n \"Action\": [\n \"s3:GetObject\"\n ],\n \"Resource\": [\n \"arn:aws:s3:::exports/*\"\n ]\n },\n {\n \"Sid\": \"WriteExports\",\n \"Effect\": \"Allow\",\n \"Action\": [\n \"s3:PutObject\"\n ],\n \"Resource\": [\n \"arn:aws:s3:::exports/*\"\n ]\n }\n ]\n}",
"before": "{\n \"Version\": \"2012-10-17\",\n \"Statement\": [\n {\n \"Sid\": \"ReadExports\",\n \"Effect\": \"Allow\",\n \"Action\": [\n \"s3:GetObject\"\n ],\n \"Resource\": [\n \"arn:aws:s3:::exports/*\"\n ]\n },\n {\n \"Sid\": \"DenyProduction\",\n \"Effect\": \"Deny\",\n \"Action\": [\n \"s3:DeleteObject\"\n ],\n \"Resource\": [\n \"arn:aws:s3:::production/*\"\n ]\n }\n ]\n}"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"after": {
"maxLength": 262144,
"type": "string"
},
"before": {
"maxLength": 262144,
"type": "string"
}
},
"required": [
"before",
"after"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}