Add tax to a net amount or extract tax from a gross amount, using a supplied rate or an embedded table of US state (state + avg local) and worldwide VAT/GST rates.

Compute SHA256 hash or SHA-512, SHA-1 and MD5 checksums for UTF-8 text and return hex plus Base64 digests. Use for SHA256 hashing, checksum verification, integrity checks, content fingerprints, cache keys, deduplication and agent pipelines.

Generate a solid-color placeholder image with optional centered text (no input image needed).

Generate deterministic fake test rows from a field->type spec plus a seed (names, emails, phones, addresses, dates, ints, bools). Output JSON, CSV, or NDJSON. Same seed always yields the same data -- reproducible fixtures.

Search Hacker News stories and comments by query, sorted by relevance or date (Algolia HN).

Fetch a web page and return a concise summary and key points (SSRF-safe fetch + Claude).

ENS name resolution + reverse lookup via public Ethereum RPC.

Convert an amount between currencies at the latest ECB reference rate (Frankfurter, keyless).

Gas price in the Roundhouse canonical contract: CAIP-2 chain to current base_fee_gwei and as_of. Recurring fee-state primitive for transaction timing and autonomous execution.

Extract webpage metadata, OpenGraph and JSON-LD for one public URL. Scalar single-URL contract for MCP and autonomous buyer runtimes.

pdfpeek (Tanod) PDF compression: lossless restructuring or image re-encoding.

sitepeek (Tanod) OCR: the text of a public PNG, JPEG, WebP, GIF or TIFF image (tesseract), with word count and mean word confidence, run in an isolated, resource-limited process. Read-only.

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month. On the paid retry send the payment together with header x-api-key: lsk_... or Authorization: Bearer lsk_.... A payment without a live key is not charged. Get a free lsk_ key without a browser: POST https://api.loyalspark.online/siwe-nonce, sign a SIWE message (Chain ID 8453) containing 'Register Loyal Spark merchant agent', then POST {message, signature, name} to https://api.loyalspark.online/agent-register-siwe. Guide: https://loyalspark.online/.well-known/skills/00-getting-started.md The call is scoped to the wallet behind that key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

Relative strength of a coin vs BTC over a period, returned as a category (very_strong → very_weak) plus a numeric score. Use to rank a coin's momentum against the benchmark before entering. A strength read, not a price target.

NANP area code lookup: region, state, country, timezones, current local time, toll-free/premium/geographic flags. Static authoritative dataset (450 NPAs), sub-10ms responses.

Generate a solid-color placeholder image with optional centered text (no input image needed).

Generate v4 (random) or v5 (name-based) UUIDs in a batch; optional uppercase / no-hyphens.

toolsniff (Tanod) static security scan of an AI-agent skill or MCP server package: prompt injection, hidden text, remote code, credential access, exfiltration, install hooks, over-broad MCP tools, typosquats and known-vulnerable dependencies; JSON report. The package is never run.

sitepeek (Tanod) PDF text: the text and document metadata of a public PDF (up to 200 pages), parsed in an isolated, resource-limited process. Read-only.

pdfpeek (Tanod) PDF metadata: read, set or strip a PDF's document metadata.