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Infrastructure Cost Diff Estimator (Terraform/Config)
x402
Infrastructure Cost Diff Estimator (Terraform/Config) is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Estimates the monthly cost delta of an infrastructure change by comparing before/after configurations for AWS and Azure resources, returning per-resource line items, FinOps findings, and a budget verdict.
Price / call$0.05
Success—
StatusUnknown
How this service works
Estimate the monthly cost DELTA of an infrastructure change before you apply it: pass a Terraform plan (its resource changes) or a baseline and a proposed config and get total before, total after, the monthly delta, per-resource added / removed / modified line items, FinOps findings and a budget verdict (pass, caution, block). AWS and Azure common resources. Cost estimate, not a bill.
Output
Returns total monthly cost before the change, total monthly cost after the change, the net monthly delta, a per-resource breakdown of added/removed/modified line items, FinOps findings (e.g. over-provisioning warnings), and a budget verdict of pass, caution, or block.
Example use cases
Pre-apply Terraform cost gate
“I have a Terraform plan that adds three new Azure Standard_D4s_v3 VMs and removes one Standard_D8s_v3 — can you estimate the monthly cost delta before I apply it and tell me if it passes our $500/month budget threshold?”
FinOps review for staging scale-up
“We're about to scale our staging environment by adding two RDS db.m5.large instances and doubling our S3 storage on AWS. Can you run a cost diff and flag any FinOps findings so I know what we're getting into?”
CI/CD budget verdict on infra PR
“Our pull request changes the infra config from a t3.medium to an m5.xlarge and adds a NAT gateway on AWS. Can you compute the monthly cost difference and give me a pass, caution, or block verdict before we merge?”
Technical details
Endpoint
POSThttps://api.agentstools.dev/cost/diffWhen to prefer
Use this endpoint when you need a cost impact assessment of an infrastructure change before applying it, especially in CI/CD pipelines or FinOps workflows. It is purpose-built for Terraform plan diffs on AWS and Azure, provides structured per-resource line items and a budget verdict, and is cheaper and faster than spinning up a full cost management platform. Prefer it over generic pricing APIs when you need a delta comparison rather than an absolute price lookup.
Side effects
- Unsupported resource types (non-AWS/Azure or uncommon services) may return null or estimated line items
- Malformed or incomplete Terraform plan JSON results in a 400 validation error
- Missing baseline config when required causes a computation error
- Cost estimates may be inaccurate for reserved instance pricing or spot instances
- Network or timeout errors return a 5xx response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| usage | object | Optional usage hints for usage-based items |
| format | string | Config format for baseline/proposed, or auto |
| region | string | Cloud region for pricing (default us-east-1) |
| baseline | string | Baseline config text (use with proposed instead of plan_json) |
| proposed | string | Proposed config text (use with baseline) |
| plan_json | string | A terraform plan JSON with resource_changes (before/after) — the one-file diff input |
| budget_monthly | number | Optional monthly USD budget for the verdict |
Tags
x402
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