Estimate credit cost and check balance. Fast mode (default): 1 credit/image — input resized to 2500px, output up to 2500px. Works with any input size. HD mode: 2 credits/image — input preserved up to 4096px, output up to 4096px. REQUIRED: Call this before EVERY remove_background or batch_remove_background call. After calling, present the result to the user and ask: "This will use X credit(s) (you have Y). Proceed?" Only call the processing tool AFTER the user confirms. If canAfford is false, tell the user they need more credits before proceeding.

Remove the background from a single image. MANDATORY WORKFLOW — follow these steps in order: (1) Call estimate_credits first (imageCount=1). Show user the cost + balance. Ask for confirmation. (2) Only call this tool AFTER the user confirms. (3) After this returns a jobId, poll get_job_status every 3 seconds until status is "succeeded". (4) Call download_results to get the final download URL. Credit cost: 1 credit (Fast mode, default) or 2 credits (HD mode). Fast mode works with any input size — large images are just downsampled to 2500px output. Use HD only when user needs output above 2500px, or subject has fine edge detail (hair, fur, feathers). refineEdges (requires HD): removes color bleeding at edges — recommend for products on colored backgrounds. No extra credit. IMPORTANT about local files: if user has a local file, do NOT use base64 — base64 tool inputs are stored in the conversation context and a 1MB image consumes ~340k tokens, making the conversation unusable. Instead tell the user: "Please share a public URL for your image (e.g. Google Drive share link, iCloud, Dropbox) or use https://simplypng.app directly."

Remove backgrounds from multiple images in a single batch (up to 50). MANDATORY WORKFLOW — follow these steps in order: (1) Call estimate_credits first (imageCount = number of images). Show user total cost + balance. Ask for confirmation. (2) Only call this tool AFTER the user confirms. (3) After this returns a batchId, poll get_job_status every 5 seconds until all images complete. Credit cost: 1 credit/image (Fast mode, default) or 2 credits/image (HD mode). Fast mode works with any input size — large images are downsampled to 2500px output. Use HD only when user needs output above 2500px, or subjects have fine edge detail (hair, fur, feathers). refineEdges (requires HD): removes color bleeding at edges — recommend for products on colored backgrounds. No extra credit. IMPORTANT about local files: do NOT use base64 — it fills the conversation context. Direct users to share URLs or use https://simplypng.app.

Check the status of a single job or batch. Returns status (pending/processing/succeeded/failed) and result URLs for completed jobs. Poll every 2–5 seconds until status is succeeded or failed.

Get the current signed download URL for a completed job. URLs expire after 1 hour — call this tool again if the URL has expired.