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Impossibl free tier

🎁 Trials (no card when possible) · no card · live — last verified by a probe on 2026-11-01 · impossibl.com · back to the whole list

What you get

Prepaid gateway at provider list prices, Claude, GPT, Gemini, DeepSeek and GLM among its models, whose keyless sign-up funds an account with $0.05 and adds $1 once a person claims it by email — no card

Free models

The free offer is a budget for model usage across the catalog. See Limits for its conditions and Connect for API details, where available.

Limits, in the vendor’s words

Signup credit: $0.05 (period not published) per account

Email-claim grant: $1 once per account

An account can be created by a keyless POST; email sign-in claims the additional grant once per person. Some models require a completed credit purchase and return 403 billing_required without it; adding a card or holding promotional credit does not meet that condition. The eligible subset is unpublished. Usage bills at provider list prices without token markup; top-ups start at $5 plus a 5% fee.

Where it is offered

The vendor names no country it keeps the offer from (source, read 2026-09-26).

Connect

Base URL: https://api.impossibl.com/v1
Key: IMPOSSIBL_API_KEY — get one at https://impossibl.com/dashboard
Anthropic-format base (Claude Code’s ANTHROPIC_BASE_URL): https://api.impossibl.com
Callable ids: zai/glm-5.3-flash, deepseek/deepseek-v4.1-flash, qwen/qwen3.8-27b
Note: ids are the keyless catalog’s at api.impossibl.com/v1/models, 2026-09-17; which of them the promotional credit can call is not published. The Claude Code guide sets ANTHROPIC_BASE_URL=https://api.impossibl.com and clears ANTHROPIC_API_KEY so the bearer token is used

Try it from your terminal with your key in IMPOSSIBL_API_KEY — it goes from your machine to the vendor and nowhere else:

curl -s https://api.impossibl.com/v1/chat/completions \
  -H "Authorization: Bearer $IMPOSSIBL_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"model":"zai/glm-5.3-flash","messages":[{"role":"user","content":"2+2? MAKE NO MISTAKES."}]}'

Evidence

Probe: the page at https://impossibl.com/llms.txt, anchored on claiming adds an extra $1, a $0.05 signup bonus; ids checked in https://api.impossibl.com/v1/models
Source: https://impossibl.com/llms.txt
Source: https://api.impossibl.com/auth.md
Source: https://impossibl.com/docs/billing
Source: https://impossibl.com/docs/integrations

History

Each line is a change to what this page publishes, dated the day it reached the list, in UTC.

2026-09-17 — Added: Prepaid gateway at provider list prices over 128 models, Claude, GPT, Gemini, DeepSeek and GLM among them, whose keyless sign-up funds an account with $0.05 and adds $1 once a person claims it by email — no card

Generated from registry.yaml on 2026-11-02 and re-verified twice a week; the full list, the Atom feed and the machinery are at https://github.com/mvalentsev/awesome-free-ai-coding.

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