get_block_at_time
chainpeek: find the block at a point in time on Ethereum, Base or Robinhood Chain. For the latest block use get_block_number. Returns block (the last block at or before the time) and next_block, or is_latest: true when the time is at or after the head. A time before Base's genesis is a 422 before...
This record as markdown: /tools/dev-tanod-tanod/get-block-at-time.md
What get_block_at_time does on Tanod
AI agents call get_block_at_time to retrieve information from Tanod without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
chain | string | Yes | Chain to read. |
timestamp | object | Yes | Unix seconds or ISO 8601 (no offset = UTC), e.g. 2026-01-01T00:00:00Z. |
Parameters from the server's own tool schema.
Why get_block_at_time is rated Low
Even though get_block_at_time only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs get_block_at_time safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Tanod, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_block_at_time, this is the rule to start with:
get_block_at_time is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Tanod, apply this rule, and every get_block_at_time call is checked against it from then on.
Questions about get_block_at_time
chainpeek: find the block at a point in time on Ethereum, Base or Robinhood Chain. For the latest block use get_block_number. Returns block (the last block at or before the time) and next_block, or is_latest: true when the time is at or after the head. A time before Base's genesis is a 422 before_genesis (not charged). A malformed or inconsistent node answer is a 5xx and is not charged. Typically 1-3 s (about 3-6 reads). Price: USD 0.003. Free: 10 chain reads per IP per UTC day. Docs: https://tanod.dev/learn/block-at-timestamp-api.html. It is categorised as a Read tool in the Tanod MCP Server, which means it retrieves data without modifying state.
get_block_at_time accepts 2 parameters: chain, timestamp. Required: chain, timestamp. The full parameter table on this page comes from the server's own tool schema.
Register the Tanod MCP server in PolicyLayer and add a rule for get_block_at_time: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Tanod. Nothing to install.
get_block_at_time is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_block_at_time rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for get_block_at_time. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
get_block_at_time is provided by the Tanod MCP server (https://tanod.dev/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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