Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/tkhq/turnkey-agent-skillsnpx agentmods add skills/tkhq/turnkey-agent-skills/signing-transactionsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/tkhq/turnkey-agent-skills/signing-transactions)<a href="https://agentmods.dev/skills/tkhq/turnkey-agent-skills/signing-transactions"><img src="https://agentmods.dev/badge/skills/tkhq/turnkey-agent-skills/signing-transactions/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/tkhq/turnkey-agent-skills/signing-transactions"><img src="https://agentmods.dev/badge/skills/tkhq/turnkey-agent-skills/signing-transactions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00056 | $0.02924 |
| Opus 5 | $0.00028 | $0.01462 |
| Sonnet 5 | $0.00011 | $0.00585 |
| Haiku 4.5 | $0.00006 | $0.00292 |
Grade A, and why
signing-transactions scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 266 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Signing Transactions
Calling the API: JSON bodies below are the
parametersobject accepted by@turnkey/sdk-servermethods (e.g.list_wallets→client.getWallets(...),sign_raw_payload→client.signRawPayload(...)). See the rootSKILL.mdfor SDK setup and full endpoint-to-method mapping.
Overview
Turnkey provides three approaches to signing, from simplest to most control.
| What you want to do | Approach |
|---|---|
| Send ETH/tokens or SOL — simplest possible | Turnkey-managed (below) |
| Gasless/sponsored transaction | Turnkey-managed with sponsor: true (below) |
| Full control over EVM tx (custom gas, contracts, typed data) | SDK: ethers or viem — read references/evm-examples.md |
| Full control over Solana tx (programs, versioned, batch) | SDK: @turnkey/solana — read references/solana-examples.md |
| Send BTC (SegWit or Taproot) | SDK: bitcoinjs-lib — read references/bitcoin-examples.md |
| Sign on Cosmos, Aptos, Sui, TON, Tron, or any other chain | Raw payload: sign_raw_payload — read references/raw-payload-examples.md |
| Sign arbitrary bytes or messages | Raw payload: sign_raw_payload — read references/raw-payload-examples.md |
For SDK signing, Bitcoin, or raw payload signing, you must read the linked reference file — those approaches are not covered inline below.
Turnkey-managed EVM signing
Turnkey handles transaction construction, signing, broadcasting, and monitoring. Set sponsor: true for gasless transactions where Turnkey pays the fees.
Turnkey handles gas fees on your behalf (billed to the organization monthly). Note: this functionality is not available at all tiers, the human user must reach out to Turnkey support for enablement. Advise them to do so if relevant.
Send a sponsored (gasless) EVM transaction
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 266 lines · 56 tokens per session scan A 0965babae0f7
signing-transactions is a skill published in the GitHub repository tkhq/turnkey-agent-skills (2 stars, last pushed yesterday), licensed Apache-2.0. It adds 56 tokens to every session and 2,924 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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