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Return Ship

Is shipping it back even worth it? A cost estimate and a real keep/return/donate decision

Unify Dynamics LLC

Documentation
Tools9read-only
Sign-inNoneno account, no key
Data keptNoneprocessed in memory
PriceFreeoptional Pro limits
StatusLiveMCP + REST
Works withMCP · RESTany agent

Try asking

Real questions, and the tools your agent calls to answer them.

Roughly what would it cost to ship back a medium box across the country?
Tools called
estimate_return_cost
Is it worth returning this $40 item if shipping costs $12 and there's a 15% restocking fee?
Tools called
worth_it_decision
Should I return this or just donate it?
Tools called
donate_vs_sell_vs_return
Do I have to pay to return this?
Tools called
free_return_check_tips
How should I pack this for a return?
Tools called
packaging_tips
What's different about returning something internationally?
Tools called
international_return_note
What's a restocking fee?
Tools called
glossary

About

Returnship is a fully local return-shipping cost estimator and a keep/return/donate/resell decision framework. estimate_return_cost gives an illustrative general cost range for a return by package size category, weight and distance tier — general ballpark figures, never a live quote from or a claim about any real carrier's current rates. size_category_guide and distance_tier_guide explain the categories. worth_it_decision nets a refund against any restocking fee and your own return-shipping cost (if the seller doesn't cover it) to show what you'd actually net back, with a verdict. donate_vs_sell_vs_return compares the net value of returning, keeping, donating, or reselling the item yourself, side by side, and names the best option by net cash value. free_return_check_tips lists what to check before assuming you must pay for return shipping. packaging_tips gives general packing guidance that avoids dimensional-weight surprises and damage-claim disputes. international_return_note orients you to the typical added cost, time and steps for an international return, and glossary defines restocking fee, dimensional weight, RMA, prepaid return label, return window and drop-off vs. pickup.

Sources: General, illustrative domestic/international parcel shipping cost patterns by size, weight and distance — not a live quote from, or a claim about, any specific real carrier's current published rates. All decision math runs locally on numbers you supply. Zero upstream calls.

Privacy

The publisher, Unify Dynamics LLC, states that tool inputs are processed in memory and not retained.

Data not collectedNo account, no profile, no stored prompts or results.
Privacy policyTerms

What it can do

9 tools, grouped by job. Every one is read-only or compute-only.

OpenAPI
Estimate3 tools
  • Estimate return costAn illustrative, general cost range for shipping a return, based on package size category, weight and distance tier — a ballpark for the…
  • Size category guideThe package size categories used by estimate_return_cost, with example contents and typical weight range for each.
  • Distance tier guideThe distance tiers used by estimate_return_cost, with what each roughly covers.
Decide2 tools
  • Worth it decisionNets a refund against any restocking fee and your own return-shipping cost (if the seller doesn't cover it) to show what you'd actually net back,…
  • Donate vs sell vs returnCompares the net value of returning it, keeping it, donating it, or reselling it yourself, side by side, and names the best option by net value.
Do it well3 tools
  • Free return check tipsGeneral things to check before assuming you have to pay for return shipping — prepaid labels, free in-store returns, restocking fees, return…
  • Packaging tipsGeneral packing guidance for a smoother return — reusing original packaging, covering old labels, weighing the package yourself to avoid…
  • International return noteGeneral orientation on what's different about an international return — typical added costs (customs, duties, brokerage), added time, and…
Reference1 tools
  • GlossaryDefinitions of return-shipping terms — restocking fee, dimensional weight, RMA, prepaid return label, return window, drop-off vs.

Information

PublisherUnify Dynamics LLC
CategoryEveryday life · Shopping
LanguagesEnglish
Built forGlobal (cost ranges reflect general domestic/international parcel shipping patterns)
CompatibilityAny MCP client · any agent · REST
Version0.1.0
MCP endpointhttps://returnship.connectorbay.com/mcp
REST APIopenapi.json
SupportGet help · Status
CountryWorldwide

Connect it to your agent

Three ways in, the same 9 tools.

MCP (Claude, Cursor, Windsurf, VS Code, any MCP client)https://returnship.connectorbay.com/mcp
RESTPOST https://returnship.connectorbay.com/v1/tools/<tool>
OpenAI function callinghttps://connectorbay.com/openai/returnship.json
OpenAI-compatible chathttps://connectorbay.com/v1/chat/completions · how it works
  • Add the MCP URL in your client's connector, MCP or integration settings (streamable HTTP, no OAuth).
  • Key: none needed.
  • Ask a question; the agent picks the right tool and answers from the live data.

Return Ship connector: questions and answers

What is the Return Ship connector?

Returnship is a fully local return-shipping cost estimator and a keep/return/donate/resell decision framework. It is a hosted MCP server with 9 tools such as Estimate return cost, Size category guide, Distance tier guide, Worth it decision, Donate vs sell vs return, Free return check tips, published by Unify Dynamics LLC. It is independent and not affiliated with Return Ship.

How do I connect Return Ship to Claude, ChatGPT or Cursor?

Add the MCP endpoint https://returnship.connectorbay.com/mcp to your client's MCP, connector or integration settings (streamable HTTP, no OAuth). For REST, POST JSON to https://returnship.connectorbay.com/v1/tools/<tool>; the OpenAPI description is at /openapi.json. For OpenAI function calling, load https://connectorbay.com/openai/returnship.json.

Do I need an account or API key for Return Ship?

No. The connector needs no sign-in and no key. An optional Pro key only raises rate limits.

Is Return Ship read-only?

Yes. Every tool reads or computes. Nothing is created, changed, sent, paid or deleted in your account.

Is the Return Ship connector free?

Yes. It is free to use within the published rate limits; an optional Pro key raises them. There is no account to create.

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Documentation

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What Returnship is for

"Is it even worth shipping this back?" — a fully local return-shipping cost estimator paired with a real decision framework, because the answer usually isn't just about the shipping cost alone.

What it does

estimate_return_cost gives an illustrative, general cost range for a return based on package size category, weight and distance tier — a ballpark for the decision, never a live quote from or a claim about any specific real carrier's current rates (those vary by carrier, service level, dimensional weight and fuel surcharges). size_category_guide and distance_tier_guide explain the categories with examples. worth_it_decision is the core calculator: it nets your refund against any restocking fee and your own return-shipping cost (if the seller doesn't provide a free label) to show what you'd actually net back, with a plain verdict. donate_vs_sell_vs_return widens the frame — it compares the net cash value of returning the item, keeping it, donating it, or reselling it yourself, side by side, and names the best option by net value. free_return_check_tips lists what to check before assuming you must pay for return shipping (prepaid labels, free in-store returns, restocking fees, return windows, damaged/wrong-item exceptions). packaging_tips gives general packing guidance that avoids common return problems like dimensional-weight surprises and damage-claim disputes. international_return_note orients you to what's typically different about an international return — added cost, added time, customs paperwork. glossary defines restocking fee, dimensional weight, RMA, prepaid return label, return window and drop-off vs. pickup.

What it is not

Not a live shipping-rate quote from any real carrier — every cost figure is a general, illustrative range meant to support the keep-vs-return decision, not to replace getting an actual quote or checking your return label before you decide. It also doesn't know the item's actual condition, your local donation options, or your region's specific customs rules — those are inputs you bring to the decision tools.

Privacy policy

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Return Ship — Privacy Policy

Effective 25 September 2026. Unify Dynamics LLC ("we", "us"), Menlo Park, California.

What Returnship is. Returnship is a connector (an MCP server and REST API) that AI assistants and personal agents call on your behalf for a fully local return-shipping cost estimator and a keep/return/donate/resell decision framework. You interact with your assistant; the assistant sends us only the arguments needed for that one calculation.

What we receive. The arguments of each tool call — a package size category, weight and distance tier, a refund amount, an item value, a restocking fee percentage, or a glossary term — the technical headers needed to serve the request (an IP address or a client identifier supplied by the assistant, and a Pro API key if you have one), and standard server logs.

Everything is computed locally and nothing is stored. No request is forwarded to any third party, including any shipping carrier or retailer — there is no upstream call at all — and no item, amount, or query is logged in request bodies, recorded, or used to train anything.

What we do not receive or store. We do not receive your conversation with the assistant, your name, your address, or what item or order you're dealing with, and we do not build a profile from your queries: each request is answered independently and nothing carries over between requests. Rate-limit counters (a client identifier and timestamps) are held in memory for at most 24 hours. Hosting-provider access logs, which contain IP addresses and request paths but not request bodies, are retained for up to 30 days for security and abuse prevention.

Sub-processors. None — every calculation runs locally on the server. Hosting: Vercel (United States regions).

Legal bases and your rights. Our processing is necessary to provide the service you request through your assistant. Because we store no personal data beyond short-lived logs, requests to access, correct or delete personal data are usually satisfied automatically; you can still contact agent@connectorbay.com and we will respond within 30 days. We do not sell or share personal information and do not use your data to train models.

Children. Returnship is a general-audience service operated by the adult using the assistant.

Changes. We will post changes here with a new effective date.

Terms of service

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Return Ship — Terms of Service

Effective 25 September 2026. These terms govern use of the Returnship connector ("the Service") operated by Unify Dynamics LLC ("we", "us").

  1. The Service. Returnship returns a fully local return-shipping cost estimator and a keep/return/donate/ resell decision framework — illustrative cost ranges, a worth-it calculator, a broader decision comparison, general tips, and a glossary. It is accessed through an AI assistant or directly over MCP or HTTP.
  2. Illustrative estimates, not carrier quotes. Cost ranges are general, illustrative figures for typical parcel shipping by size, weight and distance tier. They are not a quote from, and do not represent, any specific real carrier's current published rates, which vary by carrier, service level, dimensional weight rules and surcharges, and change over time. Get an actual shipping quote or check your return label before deciding based on price alone.
  3. Not legal, tax or financial advice. References to donation deductions or resale value are general orientation, not advice about your specific tax situation or the market value of your specific item.
  4. Acceptable use. Automated use within the published rate limits is welcome.
  5. Availability. The Service is provided "as is" without warranty. We may change, limit or discontinue it at any time.
  6. Data. Our Privacy Policy describes what we process. In short: your inputs are used only to compute one response, and nothing is stored.
  7. Pro keys. Optional Pro API keys are issued at our discretion, are personal to the holder and may be revoked for abuse.
  8. Liability. To the fullest extent permitted by law, Unify Dynamics LLC is not liable for any loss arising from a keep, return, donate or resell decision made using this Service's output. Our total liability is limited to US $100.
  9. Governing law. California law; venue in San Mateo County, California.
  10. Contact. Unify Dynamics LLC · agent@connectorbay.com · https://connectorbay.com/returnship

Support

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Return Ship support

Email agent@connectorbay.com. We answer within two business days.

When you report a problem, include the question you asked your agent, roughly when, and which agent you used (for example Claude, ChatGPT or Gemini). Never send us passwords, account numbers or ID numbers. Return Ship never asks for them.

Get Return Ship

Free · No sign-in · Read-only

Streamable HTTP, stateless, no authentication. Paste the endpoint into any MCP-capable agent.

https://returnship.connectorbay.com/mcp
{
  "mcpServers": {
    "returnship": {
      "type": "http",
      "url": "https://returnship.connectorbay.com/mcp"
    }
  }
}