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NFT Metadata Mutator with Canonical Hash
x402
NFT Metadata Mutator with Canonical Hash is a paid API for AI agents from gaming.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Applies ordered set/remove attribute and set name/description operations to caller-supplied NFT metadata, then returns a hash of the canonical result.
Price / call$0.003
Success—
StatusUnknown
How this service works
Applies ordered set/remove attribute and set name/description operations to caller-supplied metadata, then hashes canonical output. It does not mint, sign, upload, mutate an on-chain token, preserve media, or verify ownership.
Output
Returns the mutated metadata object reflecting all applied operations in order (set_attribute, remove_attribute, set_name, set_description), along with a deterministic canonical hash of the final metadata state. No on-chain changes are made; the result is a pure in-memory transformation with a verifiable fingerprint.
Example use cases
Leveling up game asset traits
“I want to update my game character's NFT metadata for asset 'hero-007' — it currently has attributes strength:50 and level:3 — apply set_attribute strength to 80 and set_attribute level to 10, then give me the hash of the canonical result so I can verify it before any on-chain action.”
Cleaning deprecated metadata fields
“For asset 'armor-119' with attributes [{key:'legacy_id',value:'old_001'},{key:'defense',value:40}], apply a remove_attribute on 'legacy_id' and set_description to 'Titanium plate armor, Season 2 edition', and return the mutated metadata plus its canonical hash.”
Renaming and rebranding a digital collectible
“I need to rename my collectible asset 'card-555' — current name is 'Draft Card' and description is 'Placeholder' — set_name to 'Golden Foil Champion' and set_description to 'A rare holographic card from the 2024 championship series', then hash the result.”
Technical details
Endpoint
POSThttps://gaming.halowerk.com/v1/nft-metadata-mutateWhen to prefer
Choose this endpoint when you need to apply ordered mutations (add/remove attributes, rename, re-describe) to NFT or game asset metadata purely off-chain and want a deterministic canonical hash of the result for integrity verification, staging, or pre-commit diffing — without touching any blockchain, signing anything, or storing media. Prefer this over on-chain mutation tools when you want to preview or validate metadata transformations before committing them.
Side effects
- Operations array is empty (minItems:1 violated) — returns validation error
- Attribute key exceeds 128 characters — returns schema validation error
- Metadata object missing required fields (name, description, attributes) — returns 400
- Asset ID is blank or exceeds 256 characters — returns validation error
- Operation references unknown op enum value — returns validation error
- More than 1000 operations or attributes submitted — returns payload too large error
- Malformed attribute value type not in [string, number, boolean, null] — returns type error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| asset_id | string | |
| metadata | object | |
| operations | array |
Tags
x402
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