feat: add Cloud World Model — x402 multi-cloud simulation API (Solana + Base)

[canvascloudai]

What is Cloud World Model?

Cloud World Model is a multi-cloud infrastructure simulation platform that lets AI
agents model AWS, GCP, Azure, OCI, and DigitalOcean deployments without provisioning
real cloud resources. The API exposes RL training loops, chaos engineering, multi-cloud
cost comparison, predictive scaling validation, and AI architecture analysis — all
metered via x402 pay-per-call on Solana mainnet USDC and Base mainnet USDC.

No account, no API key, and no prior registration required. Agents pay only for what
they use.

Entry location

providers/cloudworldmodel/cloud-simulation/
├── PAY.md
└── openapi.json

Key fields

Field	Value
name	cloud-simulation
title	Cloud World Model API
category	developer-tools
service_url	https://www.cloudworldmodel.ai
openapi.path	openapi.json

Payment networks

Network	CAIP-2	Asset	Address
Solana mainnet	solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC-SPL	EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v
Base mainnet	eip155:8453	USDC	0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Facilitator: https://facilitator.payai.network (PayAI, x402 v2, no API key required)

Proof of compliance

• x402scan server listing: https://www.x402scan.com/server/1a8052f0-c764-420a-96a5-f50d3c696795
• Discovery endpoint: GET https://www.cloudworldmodel.ai/api/billing/x402/config
• Live 402 check: see Check output section below.
• Implementation blog post: https://www.cloudworldmodel.ai/blog/x402-cloud-simulation-api

[greptile-apps]

Greptile Summary

The PR adds the Cloud World Model provider and its OpenAPI sidecar for x402-metered multi-cloud simulation on Solana and Base.

• Adds valid registry metadata and agent-facing usage guidance.
• Documents pricing, payment flow, and spend-aware usage.
• Defines the provider’s lifecycle, simulation, RL, chaos, optimization, and AI endpoints.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains; all previously reported findings are fixed in the current code.

Important Files Changed

Filename	Overview
providers/cloudworldmodel/cloud-simulation/PAY.md	Adds provider metadata and usage documentation; the previously reported use-case and category validation defects are corrected.
providers/cloudworldmodel/cloud-simulation/openapi.json	Adds the API specification; the previously missing x402 security scheme is now declared and all referenced security names resolve.

_{Reviews (3): Last reviewed commit: "fix: use devtools category from registry..." | Re-trigger Greptile}

[greptile-apps]

Invalid provider use-case metadata

When CI validates the new provider, this approximately 670-character use_case exceeds the 255-character maximum and starts with Call this API instead of the required Use for or Use when, causing static catalog validation to reject the provider.

Knowledge Base Used: Provider registry (providers/)

[greptile-apps]

Undeclared x402 security schemes

Metered operations reference x402, and walletAuthX402Session references X402Payment, but neither name is declared under components.securitySchemes, making these security requirements invalid and causing OpenAPI validators or generators to reject the specification or omit the required payment authentication.

Knowledge Base Used: Provider registry (providers/)

[greptile-apps]

Unsupported provider category

When CI validates this provider, developer-tools falls outside the registry's fixed category enum, causing the static catalog check to fail and preventing the provider from being published.

Suggested change

	category: developer-tools
	category: devtools

Knowledge Base Used: Provider registry (providers/)