Try it now — no signup, no install
Paste a tool response. Watch it shrink.
This is the actual shaping mechanism, running in your browser — same logic, same GPT-4o tokenizer the proxy bills against. Nothing leaves this page, so go ahead and paste a real response from your API, CRM, or MCP server.
No keep-list? You still get the lossless layer — null/empty
fields and audit metadata removed. That can never change the model's answer.
Field matching is casing-robust: order_id finds
orderId, OrderID, …
Paste JSON on the left — or load a sample —
and the saving appears here instantly.
0 fields dropped — show exactly which
Take it home — copy this as a proxy policy
Counted with the GPT-4o tokenizer (o200k_base) on the
compact JSON the model would actually receive. In production this happens inline,
deterministically, on every tool call — one base_url swap.
Quality is verifiable, not asserted: the open-source
verification harness
replays raw vs. shaped context through your model and diffs the answers.
Ready when you are
Build the agent.
We'll handle the substrate.
Subscribe, paste your key into your agent, done — nothing to install. Or self-host with one command. Either way: production-ready when you are.
Prefer self-hosting?
$ curl -fsSL https://plynf.com/install.sh | sh