---
schema: "interfacedelta-service-md/1"
target_key: "sha256:eda0e8d2a890c3a1119930675d34098c7c9ea7cbb97297717a470fe7ec779132"
origin: "https://www.premierletters.com"
protocols: ["mcp"]
observed_at: "2026-11-13T20:25:22.541Z"
generated_at: "2026-11-14T10:27:24.411Z"
record_url: "https://interfacedelta.com/atlas/sha256:eda0e8d2a890c3a1119930675d34098c7c9ea7cbb97297717a470fe7ec779132"
record_api: "https://interfacedelta.com/api/v1/record/services/sha256:eda0e8d2a890c3a1119930675d34098c7c9ea7cbb97297717a470fe7ec779132"
source: "InterfaceDelta atlas"
license_note: "Use of this record is governed by https://interfacedelta.com/terms."
---

# Service record: https://www.premierletters.com

## Identity
- Origin: https://www.premierletters.com
- Endpoints: https://www.premierletters.com/api/mcp
- Protocols: mcp
- Registry names: com.premierletters/mcp
- First retained observation: 2026-11-13T20:25:22.541Z
- Latest observation: 2026-11-13T20:25:22.541Z

## Tools
MCP tools, OpenAPI operations, WebMCP tools and A2A skills; excludes prompts and resources.
Total capabilities: 13; non-tool capabilities: 0.
- Tool 1: check\_connection (mcp); inputs: poll\_secret, request\_id; inputs omitted: 0; annotations: {}
- Tool 2: connect\_account (mcp); inputs: agent\_name, email, mode; inputs omitted: 0; annotations: {}
- Tool 3: create\_order (mcp); inputs: extras, idempotency\_key, mailing, message, no\_return\_address\_ack, options, payment, recipients; inputs omitted: 3; annotations: {}
- Tool 4: create\_topup\_link (mcp); inputs: amount\_cents; inputs omitted: 0; annotations: {}
- Tool 5: get\_balance (mcp); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 6: get\_order\_status (mcp); inputs: order\_id; inputs omitted: 0; annotations: {}
- Tool 7: get\_pricing (mcp); inputs: char\_count, envelope\_output\_mode, envelope\_stock, letter\_count, mailing, mailing\_option, output\_mode, paper\_type; inputs omitted: 3; annotations: {}
- Tool 8: list\_extras (mcp); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 9: list\_handwriting\_styles (mcp); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 10: list\_orders (mcp); inputs: limit, status; inputs omitted: 0; annotations: {}
- Tool 11: list\_templates (mcp); inputs: favorites\_only, search, sort; inputs omitted: 0; annotations: {}
- Tool 12: preview\_letter (mcp); inputs: handwriting\_style, message, product\_type, recipient; inputs omitted: 0; annotations: {}
- Tool 13: verify\_address (mcp); inputs: address\_line1, address\_line2, city, state, zip; inputs omitted: 0; annotations: {}
Tools omitted: 0.

## Effect readings (AI)
- Tool 4 (create\_topup\_link): ◇ AI reading; state: counted; creates (confidence 0.85); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 5 (get\_balance): ◇ AI reading; state: counted; reads (confidence 0.88); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 6 (get\_order\_status): ◇ AI reading; state: counted; reads (confidence 0.9); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 8 (list\_extras): ◇ AI reading; state: counted; reads (confidence 0.85); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 9 (list\_handwriting\_styles): ◇ AI reading; state: counted; reads (confidence 0.88); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 10 (list\_orders): ◇ AI reading; state: counted; reads (confidence 0.91); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 11 (list\_templates): ◇ AI reading; state: counted; reads (confidence 0.9); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 12 (preview\_letter): ◇ AI reading; state: counted; none (confidence 0.87); lens: side-effects@1; model: claude-haiku-5.5.

## Change history
No changes recorded in the retained history.

## Payment rails
- Protocols observed: none.
- HTTP 402 seen in retained observations: false.

## Not covered
- We don't call tools.
- We don't rate or certify.
- We don't publish prices.
- We cover only what was observed.

## Evidence
- Identity: observed / declared; observation time: 2026-11-13T20:25:22.541Z.
- Tools: declared; observation time: 2026-11-13T20:25:22.541Z.
- Effect readings (AI): AI reading; observation time: 2026-11-13T20:25:22.541Z.
- Change history: observed; observation time: 2026-11-13T20:25:22.541Z; change observation times: none.
- Payment rails: observed; observation time: 2026-11-13T20:25:22.541Z.

```json
{
  "schema": "interfacedelta-service-md/1",
  "target_key": "sha256:eda0e8d2a890c3a1119930675d34098c7c9ea7cbb97297717a470fe7ec779132",
  "origin": "https://www.premierletters.com",
  "protocols": [
    "mcp"
  ],
  "observed_at": "2026-11-13T20:25:22.541Z",
  "generated_at": "2026-11-14T10:27:24.411Z",
  "record_url": "https://interfacedelta.com/atlas/sha256:eda0e8d2a890c3a1119930675d34098c7c9ea7cbb97297717a470fe7ec779132",
  "record_api": "https://interfacedelta.com/api/v1/record/services/sha256:eda0e8d2a890c3a1119930675d34098c7c9ea7cbb97297717a470fe7ec779132",
  "source": "InterfaceDelta atlas",
  "license_note": "Use of this record is governed by https://interfacedelta.com/terms.",
  "identity": {
    "origin": "https://www.premierletters.com",
    "endpoints": [
      "https://www.premierletters.com/api/mcp"
    ],
    "protocols": [
      "mcp"
    ],
    "registry_names": [
      "com.premierletters/mcp"
    ],
    "first_retained_observation": "2026-11-13T20:25:22.541Z",
    "latest_observation": "2026-11-13T20:25:22.541Z"
  },
  "tools": [
    {
      "name": "check_connection",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "poll_secret",
        "request_id"
      ],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "connect_account",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "agent_name",
        "email",
        "mode"
      ],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "create_order",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "extras",
        "idempotency_key",
        "mailing",
        "message",
        "no_return_address_ack",
        "options",
        "payment",
        "recipients"
      ],
      "inputs_omitted": 3,
      "annotations": {},
      "effects": null
    },
    {
      "name": "create_topup_link",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "amount_cents"
      ],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "creates",
            "confidence": 0.85
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "get_balance",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.88
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "get_order_status",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "order_id"
      ],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.9
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "get_pricing",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "char_count",
        "envelope_output_mode",
        "envelope_stock",
        "letter_count",
        "mailing",
        "mailing_option",
        "output_mode",
        "paper_type"
      ],
      "inputs_omitted": 3,
      "annotations": {},
      "effects": null
    },
    {
      "name": "list_extras",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.85
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "list_handwriting_styles",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.88
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "list_orders",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "limit",
        "status"
      ],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.91
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "list_templates",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "favorites_only",
        "search",
        "sort"
      ],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.9
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "preview_letter",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "handwriting_style",
        "message",
        "product_type",
        "recipient"
      ],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "none",
            "confidence": 0.87
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "verify_address",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "address_line1",
        "address_line2",
        "city",
        "state",
        "zip"
      ],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    }
  ],
  "capability_count": 13,
  "non_tool_capability_count": 0,
  "tool_count_scope": "MCP tools, OpenAPI operations, WebMCP tools and A2A skills; excludes prompts and resources.",
  "tools_omitted": 0,
  "tools_state": "recorded",
  "changes": [],
  "payment_rails": {
    "protocols": [],
    "http_402_seen": false
  },
  "not_covered": [
    "We don't call tools.",
    "We don't rate or certify.",
    "We don't publish prices.",
    "We cover only what was observed."
  ],
  "evidence": [
    {
      "section": "Identity",
      "classes": [
        "observed",
        "declared"
      ],
      "observed_at": "2026-11-13T20:25:22.541Z"
    },
    {
      "section": "Tools",
      "classes": [
        "declared"
      ],
      "observed_at": "2026-11-13T20:25:22.541Z"
    },
    {
      "section": "Effect readings (AI)",
      "classes": [
        "AI reading"
      ],
      "observed_at": "2026-11-13T20:25:22.541Z"
    },
    {
      "section": "Change history",
      "classes": [
        "observed"
      ],
      "observed_at": "2026-11-13T20:25:22.541Z",
      "observation_times": []
    },
    {
      "section": "Payment rails",
      "classes": [
        "observed"
      ],
      "observed_at": "2026-11-13T20:25:22.541Z"
    }
  ]
}
```