Agent Memory Key-Value Store

x402

Agent Memory Key-Value Store is a paid API for AI agents from agentsvc.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-18).

Persistent JSON key-value store for AI agents: create a store, then set, get, list, search, append, or atomically increment values across runs or between agents.

Price / call$0.002

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StatusUnknown

How this service works

126 APIs for AI agents: web scraping and crawling to Markdown, AI summaries, data extraction and cited answers, checks before installing a package or citing a source, screenshots and PDF, PDF, OCR and document conversion and more, paid per call with USDC on Base, Solana, Polygon or Arbitrum via x402. No account, no API key, free sample on every service.

Output

Returns a JSON object with a 'success' boolean and a 'data' field containing the operation result — for get/get_many: the stored value(s) and version numbers; for list: paginated key entries (optionally with values); for search: matching keys/values; for set/append/incr: the updated value and version; for the first write: the new store secret (mem_...).

Example use cases

Persist task queue across agent runs

“Append this new task object to the 'tasks/pending' key in my agent memory store mem_xyz789, keeping at most 50 items in the rolling list so the oldest ones drop off automatically.”

Share scraped data between agents

“Store this extracted product data JSON under the key 'products/item-9981' in the shared agent memory store mem_shared01 so the pricing agent can read it in its next run.”

Atomic counter for rate limiting

“Increment the counter at key 'usage/api-calls-today' by 1 in my memory store mem_lim456, and tell me the new value so I know if I've hit the daily limit.”

Technical details

Endpoint

POSThttps://agentsvc.io/api/v1/proxy/agent-memory?utm_source=zero.xyz

When to prefer

Choose this endpoint when an AI agent needs to persist state between separate execution runs, share structured data with sibling agents, maintain a rolling log or task queue, or implement atomic counters — all without requiring a dedicated database account. It is ideal for lightweight, schema-free JSON storage with built-in TTL, prefix listing, full-text search across keys and values, and optimistic locking via if_version for safe concurrent writes.

Side effects

Wrong or missing store secret returns an auth error
if_version mismatch causes a conflict error (safe concurrent update failed)
Key not found returns null or empty data
Value exceeds 64 KB size limit
Too many keys in get_many (>50) or list limit (>100) returns a validation error
TTL out of range (not 1–365 days) returns a validation error
append max_items exceeds 1000 returns a validation error
Payment failure or expired x402 token blocks the call

Input

Schema · Request body

Field	Type	Description
by	number	incr step, default 1
op	string	Default: set if value is given, get if key is given, else list
key	string
tag	string
keys	array	For get_many and delete
tags	array
after	string	list: continue after this key
limit	integer
query	string	search: words that must all appear in key or value
store	string	Store secret from an earlier call (mem_...). Omit on your first write to create a store
value	—	Any JSON value, up to 64 KB (set, append)
prefix	string
ttl_days	integer
max_items	integer	append: keep at most this many items, default 100, max 1000
if_version	integer	set only if the current version matches (0 = key must not exist)
with_values	boolean	list: include values

Output

Schema · Response

{
  "type": "json",
  "example": {
    "data": {},
    "success": true
  }
}

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