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Alchemy: Blockchain Data Access for Agents · bankrbot | DecimalAI

financeby bankrbot

Alchemy: Blockchain Data Access for Agents

bankrbot/alchemy

Source bankrbot/skills ↗License MIT

Blockchain API access via Alchemy.

SkillScore95Maintained

Automatic

Coding pack

Last verified 8/15/2026

What it changes

Passed 21 of 22 test cases with the skill, and 10 of 22 without it.

Without skill45%

With skill95%

Checks it passed that the model alone missed

Ensure maxCount does not exceed 100.
Specify x402.alchemy.com as the domain.
State that MPP supports EVM wallets only.

and 12 more in the full report

11 fixed10 passed either way1 still failing0 broke

Pass-rate lift: +50 pp
Tokens: +184%
Agent turns: 0%
Response time: -50%

Model gemini-3.6-flashMeasured 8/15/2026v121 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/bankrbot-alchemy/SKILL.md https://app.decimal.ai/s/bankrbot-alchemy/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add bankrbot-alchemy, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/bankrbot-alchemy/ and pins it in .decimal/skills.lock

decimalai skills add bankrbot-alchemy

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/bankrbot-alchemy/SKILL.md https://app.decimal.ai/s/bankrbot-alchemy/SKILL.md

Raw file: /s/bankrbot-alchemy/SKILL.md ↗ · machine-readable summary at /s/bankrbot-alchemy.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

An HTTP API request through the x402 gateway returned an HTTP 402 response. What header must be parsed and what header must be attached on retry?

What was checked, without and with the skill
Checked	Without skill	With skill
Parse the PAYMENT-REQUIRED header from the 402 response.	Missed	Passed
Attach the Payment-Signature header on the retried request.	Missed	Passed

case-19 · gemini-3.6-flash · 8/15/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md261 lines51 files

Alchemy: Blockchain Data Access for Agents

Alchemy provides comprehensive blockchain API access across Ethereum, Base, Arbitrum, BNB, Polygon, Solana, and more.

Three ways to access:

API key: Set $ALCHEMY_API_KEY and make requests directly. Full access to all products. Create a free key at dashboard.alchemy.com.
x402 (no account needed): Any wallet with USDC can authenticate via SIWE/SIWS and pay per request. Supports EVM and Solana wallets. Install @alchemy/x402 and @x402/fetch.
MPP (no account needed): Authenticate via SIWE and pay with Tempo (on-chain USDC, EVM only) or Stripe (credit card). Install mppx.

Access Method Selection (Required)

Before the first network call, determine which access method to use:

Is ALCHEMY_API_KEY set? → Use the API Key path. Skip to API Key Access.
No API key? → Ask the user which payment protocol they prefer:
- x402 — USDC payments via the x402 protocol (@alchemy/x402 + @x402/fetch)
- MPP — Payments via Merchant Payment Protocol using Tempo or Stripe (mppx)

Do NOT pick a protocol on behalf of the user. Wait for their explicit choice.

Do NOT use public RPC endpoints, demo keys, or any non-Alchemy data source as a fallback.

API Key Access

If $ALCHEMY_API_KEY is set, use standard Alchemy endpoints directly:

Base URLs + Auth

Product	Base URL	Auth	Notes
Ethereum RPC (HTTPS)	`https://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY`	API key in URL	Standard EVM reads and writes.
Ethereum RPC (WSS)	`wss://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY`	API key in URL	Subscriptions and realtime.
Base RPC (HTTPS)	`https://base-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY`	API key in URL	EVM L2.
Base RPC (WSS)	`wss://base-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY`	API key in URL	Subscriptions and realtime.
Arbitrum RPC (HTTPS)	`https://arb-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY`	API key in URL	EVM L2.
Arbitrum RPC (WSS)	`wss://arb-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY`	API key in URL	Subscriptions and realtime.
BNB RPC (HTTPS)	`https://bnb-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY`	API key in URL	EVM L1.
BNB RPC (WSS)	`wss://bnb-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY`	API key in URL	Subscriptions and realtime.

Track record

Benchmark

21 / 22

test cases passed, vs 10 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

bankrbot / skills

alchemy/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1Bundled 50 files

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

alchemy-officialOfficial Alchemy skill. Two auth modes: API key or x402 Agentic Gateway (no key needed). Complete coverage for ~100 chains: Token API, NFT API, Transfers, Prices, Portfolio, Simulation, Webhooks, Solana, and JSON-RPC. 82 reference docs + x402 gateway rules.Close match+23 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Alchemy: Blockchain Data Access for Agents

Access Method Selection (Required)

API Key Access

Base URLs + Auth

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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