# list_credit_packs

List the prepaid credit packs the project owner can purchase. Read-only. Identify a pack to start_topup by its eurCents.

Agent View of the PolicyLayer registry record for `list_credit_packs`. HTML page: https://policylayer.com/tools/dev-echorelay-management/list-credit-packs

## Facts

- Tool: `list_credit_packs`
- Server: EchoRelay (`https://mcp.echorelay.dev`) — https://policylayer.com/tools/dev-echorelay-management.md
- Homepage: https://github.com/https://mcp.echorelay.dev
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "list_credit_packs",
    "arguments": {}
  }
}
```

## Why list_credit_packs is rated Low

This tool only queries and lists available credit pack options for informational purposes. It performs no write, execute, destructive, or financial operations—it merely retrieves data. The 'Read-only' designation and listing operation confirm it belongs in the Read category with low severity.

From the tool's own definition: "Tool description explicitly states 'List the prepaid credit packs the project owner can purchase. Read-only.' It retrieves available purchasing options without modifying data or financial state."

## Use case

AI agents call list_credit_packs to retrieve information from EchoRelay without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches EchoRelay:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_credit_packs": {}
  }
}
```

## Other tools on EchoRelay (77)

- `cancel_line_publish` — Destructive — https://policylayer.com/tools/dev-echorelay-management/cancel-line-publish.md
- `delete_credential` — Destructive — https://policylayer.com/tools/dev-echorelay-management/delete-credential.md
- `delete_endpoint` — Destructive — https://policylayer.com/tools/dev-echorelay-management/delete-endpoint.md
- `delete_line` — Destructive — https://policylayer.com/tools/dev-echorelay-management/delete-line.md
- `discard_dlq_entry` — Destructive — https://policylayer.com/tools/dev-echorelay-management/discard-dlq-entry.md
- `discard_draft_endpoint` — Destructive — https://policylayer.com/tools/dev-echorelay-management/discard-draft-endpoint.md
- `discard_line_draft` — Destructive — https://policylayer.com/tools/dev-echorelay-management/discard-line-draft.md
- `remove_member` — Destructive — https://policylayer.com/tools/dev-echorelay-management/remove-member.md
- `revoke_api_key` — Destructive — https://policylayer.com/tools/dev-echorelay-management/revoke-api-key.md
- `revoke_project_token` — Destructive — https://policylayer.com/tools/dev-echorelay-management/revoke-project-token.md
- `rollback_config` — Destructive — https://policylayer.com/tools/dev-echorelay-management/rollback-config.md
- `dry_run_endpoint` — Execute — https://policylayer.com/tools/dev-echorelay-management/dry-run-endpoint.md
- `duplicate_line` — Execute — https://policylayer.com/tools/dev-echorelay-management/duplicate-line.md
- `cancel_subscription` — Financial — https://policylayer.com/tools/dev-echorelay-management/cancel-subscription.md
- `change_plan` — Financial — https://policylayer.com/tools/dev-echorelay-management/change-plan.md
- `downgrade_addon` — Financial — https://policylayer.com/tools/dev-echorelay-management/downgrade-addon.md
- `retry_dlq_entry` — Financial — https://policylayer.com/tools/dev-echorelay-management/retry-dlq-entry.md
- `start_subscription` — Financial — https://policylayer.com/tools/dev-echorelay-management/start-subscription.md
- `start_topup` — Financial — https://policylayer.com/tools/dev-echorelay-management/start-topup.md
- `subscribe_addon` — Financial — https://policylayer.com/tools/dev-echorelay-management/subscribe-addon.md
- `unsubscribe_addon` — Financial — https://policylayer.com/tools/dev-echorelay-management/unsubscribe-addon.md
- `default_endpoint_template` — Read — https://policylayer.com/tools/dev-echorelay-management/default-endpoint-template.md
- `get_billing` — Read — https://policylayer.com/tools/dev-echorelay-management/get-billing.md
- `get_config` — Read — https://policylayer.com/tools/dev-echorelay-management/get-config.md
- `get_dlq_entry` — Read — https://policylayer.com/tools/dev-echorelay-management/get-dlq-entry.md
- `get_endpoint` — Read — https://policylayer.com/tools/dev-echorelay-management/get-endpoint.md
- `get_key_policy` — Read — https://policylayer.com/tools/dev-echorelay-management/get-key-policy.md
- `get_line_draft` — Read — https://policylayer.com/tools/dev-echorelay-management/get-line-draft.md
- `get_metrics` — Read — https://policylayer.com/tools/dev-echorelay-management/get-metrics.md
- `get_project` — Read — https://policylayer.com/tools/dev-echorelay-management/get-project.md
- …and 47 more: https://policylayer.com/tools/dev-echorelay-management.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=dev-echorelay-management · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/dev-echorelay-management