Most buyers looking for a “China sourcing agent for metal parts” are not really shopping for a job title. They are trying to solve a specific problem: three different workshops make three different parts, nobody owns the interfaces, and the buyer is thousands of kilometres away when something goes wrong. The label matters less than two questions — who is accountable for the outcome, and how is the money shown?
We are a sourcing and freight team based in Shenzhen. We are not a factory, a machine shop or a toolroom. Since 2019 we have worked on the buyer’s side of these projects for 4,000+ buyers shipping to 200+ countries. This page describes the work in plain terms, including the cases where you probably do not need us.
- We shortlist and verify the workshops, and tell you which operations are subcontracted.
- We normalise the RFQ so every factory quotes the same scope, then show the factory invoice separately from our fee.
- We hold the quality gates: first article, sealed sample and pre-shipment inspection with a photo report.
- We keep tooling, drawings and ownership terms in the buyer’s name.
- We consolidate parts from several factories in our Shenzhen warehouse into one inspected shipment and one customs entry.
- If a supplier fails, we can move the work rather than defend the choice.
Sourcing agent, trading company, factory: three different jobs
These three are often grouped together in search results, but they sit on different sides of the transaction.
| Question | Direct factory | Trading company | Independent sourcing agent |
|---|---|---|---|
| Who makes the part | Its own workshop | Partner workshops, sometimes undisclosed | Named, verified workshops chosen for the part |
| How money is shown | One invoice from the maker | One resale price, margin inside it | Factory invoice shown separately from a disclosed service fee |
| Who answers for quality | The maker, about its own process | The reseller, within its supply chain | The agent, across all processes and suppliers |
| What happens if a supplier fails | You find a replacement | Switching may disturb the reseller’s margin | The agent can move the work without losing a sale |
| Best fit | One process, known part, established relationship | Simple products with a clear spec | Mixed-process or multi-supplier programmes where coordination is the risk |
A trading company is not automatically a problem, and a factory is not automatically the cheapest route. The test is transparency. If the party you pay will name the workshop, disclose every subcontracted step and show how it is paid, you can audit the arrangement. If it will not, you are buying a black box. Our supplier verification guide explains how we check the entity behind the invoice.
Before an order exists
Most sourcing failures are decided before a deposit is paid, in the quality of the brief. We start by building one RFQ pack that every shortlisted workshop receives: neutral 3D model, fully dimensioned 2D drawing with datums and a named general tolerance class, material grade and condition, surface finish per feature, inspection requirements, packaging, destination and quantity breaks in the same request. The full list is in our sourcing checklist.
Then we shortlist by process fit rather than by a website claim. China’s clusters are specialised: our sourcing hub map on the homepage is a starting point, with Dongguan for custom OEM parts and tooling, Ningbo for hardware and auto parts, and Shenzhen for electronics and assemblies. We verify the legal entity, the machine list, the measuring equipment and the scope of any certificate before the shop receives a drawing.
Quotes come back itemised, and we review them with the buyer line by line, including the exclusions. That process is set out in the quote breakdown, and the drawing notes that quietly inflate a number are covered in our guide to over-tolerancing. We also ask each shop for a short DFM response, because a supplier who flags two expensive features before quoting usually saves more than a negotiation does afterwards.
While the order is running
We write three gates into the purchase order: a first article dimensional report before production, a sealed and dated golden sample after the first approved run, and a pre-shipment inspection with a photo report before goods leave the consolidation warehouse. General workmanship is sampled to AQL 2.5; critical dimensions get their own plan, agreed in advance against the critical dimension list on the drawing.
We also manage the commercial paperwork that buyers rarely think about until they need to change supplier. Tooling, fixtures, programs and die drawings are recorded in the buyer’s name, with ownership, storage, maintenance and handover terms in the purchase order. The eight clauses we recommend are in the tooling ownership guide. Engineering changes go through a quoted ECN approval rather than an informal message, and each revision is logged against the supplier that received it.
After the parts are made
A mixed product rarely leaves one workshop. Machined bosses, stamped clips, folded enclosures and coated faces arrive from different places, on different days, to different standards. We bring them into our Shenzhen warehouse, check each inbound carton against the purchase order, reconcile the bill of materials as a kit, re-check critical dimensions, and photograph the result before anything is packed.
Only then do we pack and declare once: one commercial invoice, one packing list, one certificate set and one customs entry, with carton numbers that match the physical count. We work across 100+ routes covering 200+ countries and can quote DDP door-to-door, so duties and clearance are settled before the goods move. The detail is in the consolidation guide, and the duty and classification side is in the landed cost guide.
How the money is shown
This is the part we would not compromise on. The factory invoice is shown separately from our service fee, and both are itemised so a buyer can audit every line. We do not mark up a factory price inside a single resale number, and we do not take an undisclosed margin on freight.
We are not publishing a fee schedule here, because it depends on scope: how many suppliers, how many inspection visits, whether tooling is involved, and whether we are also handling consolidation and shipping. What we will do is put the structure in writing before an order starts: what the factory charges, what we charge, and what happens if the programme changes. Ask us for it. The scope of those services is summarised on our services page.
That structure is also why we can recommend a cheaper route. If the honest answer is that a part should be stamped rather than machined, or that a workshop we shortlisted is no longer the right one, our incentive is to keep the buyer, not to protect a particular factory’s quotation.
When you do not need an agent
There are programmes where an agent adds cost without adding control, and it is worth saying so plainly.
- One process, one trusted factory, repeat orders. If you have years of history and your own QC presence, the coordination risk is already covered.
- Very small one-off purchases. The cost of verification and inspection may outweigh the value of the order.
- You already employ a China-based engineering and QC team. They can run the gates we have described.
- Off-the-shelf catalogue parts. There is no custom drawing to protect, no tooling to own and no process to qualify.
The model earns its keep when a product crosses several suppliers, when drawings and tooling need protecting, when nobody on the buyer’s side can visit the factory, or when a failed part would stop a production line. The less of that applies, the less you need us.
A short checklist for choosing any agent
- Will they name every workshop and disclose every subcontracted process?
- Will they show the factory invoice separately from their fee, in writing, before the order?
- Do they run independent inspection with dated photographs, or do they relay the factory’s own report?
- Can they move production to another supplier without penalising you?
- Who owns the die, fixtures, programs and drawings, and is that in the purchase order?
- Do they have their own consolidation warehouse, and who is the licensed customs broker?
- Will they sign an agreement that your own lawyer has reviewed before receiving CAD files?
- Do they ever tell you a project is not a fit, or do they agree with everything?
The last question is the most revealing. An agent who cannot say no to a bad order is not sitting on your side of the table.
Frequently asked questions
What does a China sourcing agent actually do for metal parts?
For custom parts the work is: build a comparable RFQ, shortlist and verify workshops by process fit, obtain itemised quotes, put quality gates and tooling ownership into the purchase order, inspect before shipment, consolidate parts from multiple factories and arrange export and delivery. The value is in owning the interfaces between suppliers, not in finding a name on a directory.
Is a sourcing agent the same as a trading company?
No. A trading company typically buys and resells at a single price with its margin inside it. An independent agent acts for the buyer, discloses the factory, and shows the factory invoice separately from a stated service fee. The distinction is transparency and accountability, not the business licence.
How are China sourcing agent fees structured?
It varies with scope: number of suppliers, inspection visits, tooling involvement and whether freight and consolidation are included. We do not publish a flat rate here. Ask any agent to put the structure in writing before the order, and be cautious about a single resale price with no breakdown.
Can an agent protect my drawings and tooling?
They can put the right structure in place: staged file release, an agreement reviewed by your own lawyer, named recipients and revision records, plus ownership, storage and handover clauses in the purchase order. No agent can substitute for your own IP filings or legal advice in the markets where you sell.
Do I need an agent if I already have a factory in China?
Not necessarily. If you have one process, a long relationship and your own QC presence, the coordination risk is low. An agent becomes useful when a second or third supplier enters the product, when you need an independent inspection report, or when you want the option to change workshops without rebuilding the tooling from scratch.
If your programme involves more than one workshop, send us the drawing, the supplier list and your destination country. We will map the hand-offs, show you how the quote and the fee would be itemised, and come back within 24 hours. Send your requirement and we will start with the RFQ pack.