# Killion Apps > Independent commerce software studio building Promotion Allocation for agents, and Listing Hub and Customizer for print-on-demand sellers. ## Promotion Allocation - Product overview: https://killionapps.com/promotion-allocation/ - Developer integration kit: https://killionapps.com/developers/ - Free independent agent pilot: https://killionapps.com/pilot/ - Machine-readable pilot manifest: https://killionapps.com/pilot/manifest.json - Dependency-free pilot runner: https://killionapps.com/pilot/run-pilot.mjs - Browser operator pilot: https://killionapps.com/pilot/operator/ - Signed pilot attestation: https://killionapps-promotion-allocation-sandbox.onrender.com/v1/pilot/attest - Pilot receipt public key: https://killionapps-promotion-allocation-sandbox.onrender.com/.well-known/pilot-receipt-key.json - Agent skill and purchase guide: https://killionapps.com/skill.md - A2A Agent Card: https://killionapps.com/.well-known/agent-card.json - Compact integration manifest: https://killionapps.com/integration.json - Remote MCP (Streamable HTTP): https://killionapps-promotion-allocation-sandbox.onrender.com/mcp - OpenAPI: https://killionapps-promotion-allocation-sandbox.onrender.com/openapi.json - Machine quote: https://killionapps-promotion-allocation-sandbox.onrender.com/v1/quote - Input/output schema: https://killionapps-promotion-allocation-sandbox.onrender.com/v1/schema - Free request validation: https://killionapps-promotion-allocation-sandbox.onrender.com/v1/validate - Paid MPP route: https://killionapps-promotion-allocation-sandbox.onrender.com/v1/allocate - Factual reputation status: https://killionapps-promotion-allocation-sandbox.onrender.com/v1/reputation - Official MCP Registry identity: com.killionapps/promotion-allocation - Agent Discovery v0.5 announcement: https://killionapps.com/updates/agent-discovery-v0-5/ One experimental portfolio decision costs $5 USD through MPP. Validate the payload for free before considering payment. Live payments remain disabled and the public endpoint uses Stripe test mode. Performance status is UNVALIDATED_FORWARD. The service does not receive authority to execute recommendations or spend money. The independent pilot is free, requires no account, supplies no payment credential, and produces a server-signed redacted receipt that the runner or browser verifies locally. An `external-participant` receipt is self-attested DECLARED evidence until human review; it is not automatically treated as verified demand or product-performance evidence. ## Listing Hub - Product overview: https://killionapps.com/listing-hub/ Listing Hub is private-beta listing operations software for print-on-demand and merch sellers. It prepares channel-specific placement, pricing, listing copy, and mockups for Etsy, TikTok Shop, and Instagram. Nothing publishes without seller approval. ## Customizer - Product overview: https://killionapps.com/customizer/ - Data handling: https://killionapps.com/privacy.html Customizer is private-beta buyer personalization software for print-on-demand and merch sellers on Etsy, fulfilled through Printify. A buyer opens a page linked from the seller's Etsy listing, signs in with Etsy, personalizes the design, and approves their own proof before buying. When the order is paid, Customizer reads the Etsy order and matches it to the approved proof by the buyer's numeric Etsy user ID, listing, variation, and quantity. The seller reviews matches and exceptions. The approved print file and the order's shipping details go to Printify. Production begins according to the seller's own Printify order-approval setting; setting it to Manual is a documented setup precondition, because no API exposes that setting to Customizer.