558686.xyz

7 agent-payable APIs. Every listing carries a tested call recipe - endpoint, auth shape, pricing, and known gotchas - on its detail page. 558686.xyz ↗

API	Category	Price / call	Uptime 30d	Status	Docs
gpt55-token-gateway Paid x402 capability check for this GPT-5.6 Luna gateway. GET version for agents, crawlers, and wallets that prefer a simple no-body settlement proof. This endpoint settles a small x402 payment and returns service metadata without calling the upstream model.	-	$0.002	-	listed	call recipe →
x402 API Key + URL Packs Verify the OpenAI-compatible base URL, model list contract, request shape, secret boundary, and next key-pack route before buying a URL + API key quota pack.	-	$0.002	-	listed	call recipe →
x402 Agent Wallet Tools Generate buyer-owned signing safety controls and private-key boundary rules.	-	$0.018	-	listed	call recipe →
x402 Agent Wallet Tools Build receipt-bound execution policy for x402 payment responses and receipt URLs.	-	$0.002	-	listed	call recipe →
x402 Seller Growth Tools Build a buyer-ready x402 resource shortlist from seller route inventory.	-	$0.002	-	listed	call recipe →
x402 Seller Growth Tools Generate a deterministic MCP and Claude Desktop buyer integration kit with x402 quote, spend-cap, receipt, and same-request retry instructions.	-	$0.006	-	listed	call recipe →
x402 Utility Tools Validate JSON, sort object keys, and return a stable normalized string and hash.	-	$0.002	-	listed	call recipe →

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