Plan Data API
Find U.S. retirement plans (401(k), 403(b), pension and others) in public DOL Form 5500 filings, plan years 2021 onward, for prospecting, benchmarking and research: by company name (fuzzy, including former and DBA names), EIN, state, assets, participants, recordkeeper (any brand, matched to today's firm) or plan type. Each result: EIN and plan number, plan and sponsor name, assets, participants, current recordkeeper. Small plans (about 9 in 10) file no Schedule C, so no recordkeeper.
SearchLiveeip155:8453Exactvia cdp
Form-5500401kProspectingLead-generationRecordkeepers
Settlements · 30d
16
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$1.82
Verified settled volume
16 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-11-08 23:34Z
—
Upstream on-chain volume
0 transactions, checked 2026-11-09 00:16Z
Paid to
0x1C79c5C2eE71ADDaeADe5CCF3F707D924C75Cb4bThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"meta": {
"query": null,
"source": "U.S. DOL Form 5500 public filings",
"data_as_of": "2026-11-02",
"pagination": null,
"api_version": "0.1.0",
"source_detail": "EFAST2 Form 5500 and 5500-SF datasets with Schedules C, H and I, as published by the U.S. Department of Labor (askebsa.dol.gov/FOIA Files). Cleaned and joined across plan years by this service; nothing is estimated or filled in.",
"coverage_notes": []
},
"error": {
"code": "payment_required",
"hint": "Pay with an x402 client: it reads the PAYMENT-REQUIRED header, signs a USDC payment and repeats the request with a PAYMENT-SIGNATURE header. Errors and empty results aren't charged. Free: /coverage, /llms.txt, /docs.",
"details": [
{
"asset": "USDC",
"pay_to": "0x1C79c5C2eE71ADDaeADe5CCF3F707D924C75Cb4b",
"network": "eip155:8453",
"endpoint": "/search",
"price_usd": 0.01,
"network_name": "Base (mainnet)"
}
],
"message": "GET /search costs $0.01 per call, paid in USDC on Base (mainnet) with x402."
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0x1C79…5Cb4b. The signed payment is good for 5 minutes.
- Paid to
- 0x1C79…5Cb4b
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1C79c5C2eE71ADDaeADe5CCF3F707D924C75Cb4b",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"name": "apple",
"limit": 3,
"state": "CA"
}
},
"output": {
"type": "json",
"example": {
"data": [
{
"pn": "001",
"ein": "942404110",
"match": {
"score": 100,
"confidence": "high"
},
"state": "CA",
"plan_id": "942404110-001",
"plan_name": "APPLE 401(K) PLAN",
"plan_type": "401(k)",
"filer_size": "large",
"recordkeeper": "Fidelity Investments",
"sponsor_name": "APPLE INC.",
"net_assets_eoy": 30737587497,
"participants_eoy": 147655,
"recordkeeper_as_of_plan_year": 2025
}
],
"meta": {
"source": "U.S. DOL Form 5500 public filings",
"data_as_of": "2026-11-02",
"coverage_notes": [
{
"code": "search_is_fuzzy"
},
{
"code": "plan_identity_by_ein_pn"
}
]
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"ein": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"description": "Sponsor EIN (9 digits, dashes allowed)."
},
"name": {
"anyOf": [
{
"type": "string",
"maxLength": 100,
"minLength": 2
},
{
"type": "null"
}
],
"description": "Company or plan name, as you know it."
},
"limit": {
"type": "integer",
"default": 10,
"maximum": 50,
"minimum": 1,
"description": "Results per page (1-50)."
},
"state": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"description": "Two-letter state of the sponsor's address, e.g."
},
"offset": {
"type": "integer",
"default": 0,
"maximum": 500,
"minimum": 0,
"description": "Results to skip (0-500)."
},
"plan_type": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"description": "Plan type: 401k, 403b, cash_balance, db_and_dc, defined_benefit, esop, ira_based, money_purchase, other_dc, profit_sharing, stock_bonus, target_benefit, type_not_coded, db, dc."
},
"filer_size": {
"anyOf": [
{
"enum": [
"large",
"small"
],
"type": "string"
},
{
"type": "null"
}
],
"description": "large = files Schedule H (generally 100+ participants; has providers and fees); small = 5500-SF or Schedule I."
},
"max_assets": {
"anyOf": [
{
"type": "number",
"minimum": 0
},
{
"type": "null"
}
],
"description": "Maximum end-of-year net assets in dollars."
},
"min_assets": {
"anyOf": [
{
"type": "number",
"minimum": 0
},
{
"type": "null"
}
],
"description": "Minimum end-of-year net assets in dollars, latest plan year."
},
"recordkeeper": {
"anyOf": [
{
"type": "string",
"maxLength": 100,
"minLength": 3
},
{
"type": "null"
}
],
"description": "Recordkeeper, any brand old or new (\"Empower\", \"Great-West\", \"Fidelity\")."
},
"include_ended": {
"type": "boolean",
"default": false,
"description": "Include plans that are terminated, merged into another plan, or stopped filing."
},
"max_participants": {
"anyOf": [
{
"type": "integer",
"minimum": 0
},
{
"type": "null"
}
],
"description": "Maximum end-of-year total participants."
},
"min_participants": {
"anyOf": [
{
"type": "integer",
"minimum": 0
},
{
"type": "null"
}
],
"description": "Minimum end-of-year total participants."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-11-09 08:18Z
- Last indexed by Roundhouse
- 2026-11-09 10:40Z
- Last enriched (probe, favicon, geo)
- 2026-11-09 00:16Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Plan Data API and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Plan%20Data%20API' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.form5500data.com/search, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.