# Instacart Developer Platform API + MCP vs Walmart Affiliate Marketing API (slim)

> Instacart Developer Platform scores 48.3 (D) to Walmart Affiliate Marketing's 38.6 (E) for affiliate product apis. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/instacart-vs-walmart-affiliate-api.md (~2,150 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/instacart-vs-walmart-affiliate-api.json · canonical https://www.anchorterminal.com/compare/instacart-vs-walmart-affiliate-api
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-14

Instacart Developer Platform API + MCP scores 48.3 (D) on agent readiness against Walmart Affiliate Marketing API's 38.6 (E), and leads in 4 of 7 scored categories. Walmart Affiliate Marketing API leads on reliability and payments & pricing. Both do affiliate product apis.

- Instacart Developer Platform API + MCP: D 48.3, rank #877 of 1076 · https://www.anchorterminal.com/tools/instacart.min.md
- Walmart Affiliate Marketing API: E 38.6, rank #995 of 1076 · https://www.anchorterminal.com/tools/walmart-affiliate-api.min.md
- Instacart Developer Platform API + MCP, good for Grocery list and recipe hand-off for meal planning and recipe agents in the US and Canada. Ahead on Schema & documentation, 80 against 27; Agent ergonomics, 71 against 57; Maintenance & community, 20 against 5.
- Walmart Affiliate Marketing API, good for Product search and affiliate links for an agent recommending Walmart products and handing the purchase to the person. Ahead on Reliability, 33 against 22; Payments & pricing, 25 against 20.

| Category | Instacart Developer Platform API + MCP | Walmart Affiliate Marketing API |
| --- | --- | --- |
| Reliability (16%) | 22 | 33 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 80 | 27 |
| Agent ergonomics (13%) | 71 | 57 |
| Security & auth (14%) | 61 | 58 |
| Payments & pricing (10%) | 20 | 25 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 20 | 5 |
| Transparency & trust (7%) | 51 | 53 |

| Fact (where they differ) | Instacart Developer Platform API + MCP | Walmart Affiliate Marketing API |
| --- | --- | --- |
| Vendor | Maplebear Inc. (Instacart) | Wal-Mart.com USA, LLC (Walmart Inc.) |
| Hosted endpoint | `https://mcp.instacart.com/mcp` | `https://developer.api.walmart.com/api-proxy/service/affil/product/v2` |
| Licence | Proprietary service under the Instacart Developer Platform Terms and Conditions | Proprietary service under the Walmart I/O API Terms of Use (last updated 30 September 2020) |
| Tools exposed | 2 | none |
| Read-only variant documented | no | yes |
| llms.txt | yes | no |
| Last release | 2026-06-18 | none |
| Terms last updated | couldn't be read | 2026-09-09 |
| Privacy policy last updated | couldn't be read | 2026-08-20 |
| Customer content may train models | couldn't be read | yes |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | not found in the text |
| Terms or service can change without notice | couldn't be read | yes |
| Arbitration or class-action waiver | couldn't be read | yes |