Marketplace · API · x402

api.form5500data.com/plan/history

Every plan year (2021 onward) of one U.S. retirement plan from public DOL Form 5500 filings, amendments resolved: net assets, participants (flagged across the 2023 counting change), average balance, approximate return, why assets changed (contributions, investment return, distributions, expenses, transfers), fees in basis points, the year's recordkeeper, advisor and auditor, and the change events detected that year, such as recordkeeper switches.

Endpoint	`https://api.form5500data.com/plan/history`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x1C79c5C2eE71ADDaeADe5CCF3F707D924C75Cb4b
method	GET
last updated	2026-11-08T23:34:50.57Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.form5500data.com/plan/history
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-25d186eae28aafd7

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}