BananaBanana Image, Video & Speech Generation

Edit / refine a previously generated image with a text instruction on Nano Banana 2 Lite / 2 / Pro (multi-turn editing: change colors, remove objects, restyle, etc.). This tool modifies an image that already exists — use generate_image to create a new image from a prompt. Pass the job_id of a COMPLETED image generation as source_generation_id. Charged like a single image of the chosen model/resolution; auto-refund on failure. Example: {"source_generation_id": "cmxyz...", "prompt": "make the background pure white and add soft shadow"}

Edit an EXISTING video with Gemini Omni Flash (video-to-video): restyle it, replace or add objects, relight the scene, change the mood — motion and composition of the source clip are preserved. Billed by output length at $0.10/s; cost confirmation is mandatory (first call returns the quote and charges nothing). Source: either source_generation_id (a completed video from this account — see list_generations) or video_url (public http(s) link, max 200 MB). The source is normalised to MP4 720p and the FIRST 10 SECONDS (model limit); output is 720p with sound, aspect ratio follows the source. OUTPUT LENGTH ALWAYS EQUALS SOURCE LENGTH (the model cannot stretch or shorten a clip), so duration only works downwards: it trims the source to the first N seconds. Omit duration to edit the whole clip — the quote tells you the resolved length. Returns a job_id; poll get_result. Failed edits are auto-refunded. Example: {"prompt": "make the whole scene look like a pencil sketch, keep the motion identical", "source_generation_id": "clx…", "confirm_cost": 1}

Start an AI image generation (Google Nano Banana family). Charges the account balance immediately and returns a job_id — poll get_result for the finished image URLs. Typical completion: 10–60 seconds. The default nano-banana-2-lite model is the cheapest option and produces 1024px images; choose nano-banana-2 explicitly for 512px, 2048px or 4096px output. Optional reference_images provide the model with the actual subject, product, character or style pixels; Nano Banana Pro supports up to 14 references. Costs $0.03–$0.20 per image depending on model and resolution (see list_models). Failed generations are automatically refunded. If a legitimate prompt is rejected by Google's content filter, retry with relaxed_filter: true. Generating several images at once (number_of_images > 1) is a batch: the first call returns a price quote and charges nothing — repeat the call with confirm_cost set to the quoted amount to start. Example: {"prompt": "studio photo of a ceramic mug on linen, soft daylight", "model": "nano-banana-2-lite", "aspect_ratio": "4:5", "resolution": "1024"}

Generate natural speech with Gemini 3.1 Flash TTS Preview. This synchronous tool returns a hosted WAV URL directly (no get_result polling). Supports one voice or an exactly two-speaker dialogue, automatic language detection or a BCP-47 language_code, natural-language direction for accent/tone/pace, and inline performance tags such as [whispers], [laughs], [very slow] and [excited]. Price is $0.01 per started 200 transcript characters; the account is charged only after Google has returned valid audio. Example: {"text":"[cheerfully] Welcome to BananaBanana!","voice":"Kore","style":"Warm product announcement, medium pace."}

Start an AI video generation (Google Veo 3.1 family or Gemini Omni Flash). EXPENSIVE: $0.10–$4.40 per clip. Cost confirmation is mandatory: the first call always returns a USD quote and charges nothing — repeat the call with confirm_cost set to the quoted amount to actually start. Returns a job_id; poll get_result (videos take 1–10+ minutes). Failed generations are auto-refunded. Models: veo-3.1-fast (default, good quality/price), veo-3.1 (best Veo quality), veo-3.1-lite (cheapest, 720p/1080p), omni-flash (always has sound, any duration from 3 to 10 s at $0.10/s, supports conversational editing via edit_from_generation_id). Content filtering differs by model: omni-flash is by far the strictest, so a clip rejected as SAFETY_FILTERED on omni-flash is often produced by veo-3.1-fast without changing a word. Video has no configurable safety settings on Google's side (relaxed_filter is accepted for Veo but only pins its default personGeneration=allow_adult), and refused clips are refunded, so a retry is cheap in money and expensive only in time. Image inputs: first_frame animates a still picture, reference_images keep a subject/style consistent — both accept a job_id of a completed image generation on this account, a public image URL, or inline base64 image data, and on omni-flash they can be combined (up to 10 images total). Example: {"prompt": "drone shot over a misty pine forest at sunrise", "model": "veo-3.1-fast", "duration": 8, "resolution": "720p", "confirm_cost": 0.70}

Get the current account balance (USD), this API key's name, optional daily spend cap and how much of it is used today. Free, no charge. Use it to check affordability before starting expensive generations.

Get the status and result of a generation job started with generate_image / edit_image / generate_video / edit_video. Waits up to wait_seconds for completion before returning (long-poll). On success returns hosted media URLs (valid 24 h — call again for fresh links), cost_charged_usd and balance_remaining_usd, plus a small inline preview for images. Free, no charge. Poll roughly every 10–15 s for videos.

List this account's recent generations (both MCP and website) — id, type, model, status, cost and prompt preview. Use it to find a job_id to re-download results or to pick a source for edit_image / edit_video / generate_video edit_from_generation_id. Free, no charge.

List all available image, video and speech generation models with current per-unit USD prices, supported resolutions, durations and constraints. Prices come from the same source as the website — call this before quoting costs to a user or choosing a model. Free, no charge.

Get a balance top-up link. OAuth connections receive a one-time deposit-only link valid for 30 minutes; opening it cannot expose API keys, profile data or generation history. Bearer API-key users receive the normal profile link. Free, no charge.